Forensics Final Study Guide
Which of the following statements is false? A.The proton has a charge of +1 B.Protons and neutron comprise the nucleus of an atom C.The neutron has no electrical charge D.The electron and proton have the same mass
D.The electron and proton have the same mass
Which of the following statements is false? A.Alcohol is broken down in the liver by oxidation B.Alcohol can be considered a brain depressant C.Alcohol is distributed nearly evenly throughout water portions of the body by blood D.The mass spectrometer measures the absorption of light by alcohol
D.The mass spectrometer measures the absorption of light by alcohol
Buccal cells are obtained from: A.Semen B.Urine C.Blood D.The mouth and inside of the cheek
D.The mouth and inside of the cheek
The production of amino acid is coded by a sequence of how many bases on the DNA molecule? A.Five B.Four C.Two D.Three
D.Three
A conventional STR profile emanating from a mixture of DNA from male donors yields four peaks or bands for each locus present. How many peaks or bands would you normally expect for each locus if a Y-STR profile is performed on the same sample? A.One B.Four C.Three D.Two
D.Two
When comparing sample writing to a suspect document, the age difference between the documents should be no more than: A.Twelve to eighteen months B.Six to twelve months C.Five to seven years D.Two to three years
D.Two to three years
Which of the following statements is true of the laboratory procedures used to detect and identify explosive residues? A.When sufficient quantities of explosives are recoverable, confirmatory tests may be performed by ultraviolet spectrophotometry B.When the bomb-scene debris and other materials arrive at the laboratory, everything is first thoroughly rinsed with acetone C.When objects collected at the site of explosion are screened, the presence of explosive residues in the field or the laboratory is assessed using a microspectrophotometer D.When a water-gel explosive containing ammonium nitrate or a low explosive is suspected, the debris should be rinsed with water
D.When a water-gel explosive containing ammonium nitrate or a low explosive is suspected, the debris should be rinsed with water
Which type of radiation is NOT given off by radioactive decay? A.Beta particles B.Gamma rays C.Alpha particles D.X- rays
D.X- rays
he elimination or "burn off" rate of alcohol averages ________ percent w/v per hour. A.0.015 B.0.10 C.0.15 D.None of the above
A.0.015
A low explosive has a velocity of detonation less than: A.1000 meters per second B.500 meters per second C.150 meters per second D.1500 meters per second
A.1000 meters per second
What approximate percentage of the population is type B? A.15 percent B.38 percent C.80 percent D.41 percent
A.15 percent
The concentration of alcohol in an exhaled breath is in direct proportion to that of the blood of the same individual. The ratio of this relationship is closest to: A.1:2,000 B.1:100 C.1:1,000 D.1:10
A.1:2,000
What is the percentage of evidence evaluated in the crime lab that is drug-related? A.75% B.60% C.35% D.25%
A.75%
To determine whether a bloodstain is of human or animal origin, the serologist will perform: A.A precipitin test B.RIA C.The luminol test D.An analysis with Hemastix strips
A.A precipitin test
One parent is type AB; the other parent is type O. A possible genotype for an offspring is: A.AO B.AB C.OO D.None of the above
A.AO
The clumping together of red blood cells by the action of an antibody is known as: A.Agglutination B.Serology C.Clotting D.Radioimmunology
A.Agglutination
Which is available in commercial form as fertilizer? A.Ammonium nitrate B.Potassium chlorate C.Diazodinitrophenol D.Triacetone triperoxide
A.Ammonium nitrate
Materials that have electrons firmly attached to their molecules: A.Are poor conductors of heat B.Are excellent conductors of heat C.Transfer heat by radiation D.Transfer heat by convection
A.Are poor conductors of heat
A substance with a pH of 8 is likely to be: A.Basic B.Water C.Neutral D.Acidic
A.Basic
For the purpose of extracting the drug out of body tissues, an amphetamine is classified as an: A.Basic drug B.Neutral drug C.Acid drug D.All of the above
A.Basic drug
PCR is a technique that: A.Can produce many exact copies of segments of DNA B.Produces information regarding the sequence of nitrogenous bases C.Virtually eliminates operator error from DNA analysis D.Provides a statistical analysis of the nitrogenous-base pairings
A.Can produce many exact copies of segments of DNA
When a suspect computer printer is not available, the examiner may need to analyze the document's ________ to identify the make and model of the machine. A.Class characteristics B.Individual characteristics C.Handwriting D.TTI
A.Class characteristics
Movement of heat through a solid object is caused by: A.Conduction B.Convection C.Radiation D.Both A and C
A.Conduction
A low dose of alcohol will NOT inhibit: A.Confidence B.Concentration C.Judgment D.Memory
A.Confidence
The PCR technique requires the use of a thermal cycler to: A.Copy DNA B.Hydrolyze polymerase C.Make probes radioactive D.Synthesize protein
A.Copy DNA
The most difficult drug addiction to overcome is that of: A.Crack cocaine B.Alcohol C.Heroin D.Nicotine
A.Crack cocaine
Examples of polymers that contain repeating units known as nucleotides are: A.DNA B.Starch C.Cellulose D.Hemoglobin
A.DNA
There is a(n) ________ relationship between the amount of alcohol in the blood and that in the alveolar breath. A.Direct B.Undetermined C.Variable D.Indirect
A.Direct
Which is an example of an impact printer? A.Dot-matrix B.Laser C.Ink-jet D.All of the above
A.Dot-matrix
Heat energy can ignite distant objects through the transmission of: A.Electromagnetic energy B.Streamers C.Oxidizing agents D.Electrons
A.Electromagnetic energy
A "fingerprint" of an element is obtained by the technique of: A.Emission spectroscopy B.Ultraviolet spectrophotometry C.Gas chromatography D.Infrared spectrophotometry
A.Emission spectroscopy
Which of the following is not a stimulant? A.Ethyl alcohol B.Cocaine C.Caffeine D.Amphetamine
A.Ethyl alcohol
Which technique allows for both separation and specific identification of a questioned mixture of substances? A.GC/MS B.UV spectrophotometry C.IR spectrophotometry D.GC
A.GC/MS
Gasoline residues are best characterized by: A.Gas chromatography B.Emission spectroscopy C.Ultraviolet analysis D.Infrared spectrophotometry
A.Gas chromatography
The analytical technique widely used for directly measuring the amount of alcohol present in the blood is: A.Gas chromatography B.Thin-layer chromatography C.Ultra-violet spectrophotometry D.Infrared spectrophotometry
A.Gas chromatography
In forensic toxicology, all positive drug findings must be confirmed by a specific chemical test. The confirmation test of choice is: A.Gas chromatography-mass spectrometry B.Ultraviolet spectrophotometry C.Infrared spectrophotometry D.Gas chromatography
A.Gas chromatography-mass spectrometry
The amount of acid phosphatase in seminal fluid is ________ the amount of acid phosphatase in blood. A.Greater than B.The same as C.Less than D.None of the above
A.Greater than
Carbon monoxide combines with what component of blood? A.Hemoglobin B.Oxyhemoglobin C.White blood cells D.Carboxyhemoglobin
A.Hemoglobin
Which of the following drugs is not found in blood or urine? A.Heroin B.Methadone C.Morphine D.Amphetamine
A.Heroin
How should blood-containing clothes from a victim be packaged? A.In breathable paper after blood has dried B.In an airtight clear plastic container C.In a metal paint can D.In an airtight metal container
A.In breathable paper after blood has dried
________ writings are partially visible impressions appearing on a sheet of paper underneath the one on which the visible writing was done. A.Indented B.Charred C.Questioned D.Obliterated
A.Indented
Some breath-testing devices for alcohol use ________ light to measure the quantity of alcohol trapped in a chamber. A.Infrared B.Ultraviolet C.Visible D.Colored
A.Infrared
Which of the following analytical technique is considered to be a specific test in a drug identification scheme? A.Infrared spectrophotometry B.Microcrystalline test C.Thin-layer chromatography D.Color test
A.Infrared spectrophotometry
The Van Urk reagent was used to test a sample and it turned bluish-purple. This indicates the presence of: A.LSD B.GHB C.MDMA D.PCP
A.LSD
Which of the following is not classified as a heavy metal? A.Lead B.Mercury C.Arsenic D.Thallium
A.Lead
The rate at which large DNA fragments move through the electrophoretic gel is ________ the rate at which small DNA fragments move through the same apparatus. A.Less than B.The same as C.Greater than D.None of the above
A.Less than
The sensitivity of the Takayama and Teichmann crystal tests for the identification of bloodstains is ________ the sensitivity of the Kastle-Meyer color test for bloodstain identification. A.Less than B.The same as C.Greater than D.None of the above
A.Less than
Which statement is NOT true? Few forensic labs do analysis of mtDNA because: A.Little mtDNA is present in a cell B.It costs much more than nuclear DNA profiling C.The analysis procedure is very rigorous D.Such study takes a long time
A.Little mtDNA is present in a cell
Duquenois-Levine solutions were used on a sample and the chloroform layer turned purple. This suggests that the tested substance is: A.Marijuana B.Heroin C.Cocaine D.Valium
A.Marijuana
Which is the most widely used illicit drug in the United States today? A.Marijuana B.Cocaine C.Alcohol D.Heroin
A.Marijuana
Heroin is a chemical derivative of: A.Morphine B.Barbituric acid C.Codeine D.Methadone
A.Morphine
Single-base smokeless powder consists of: A.Nitrocellulose B.Nitroglycerine C.Potassium chlorate and nitrocellulose D.Nitrocellulose and nitroglycerine
A.Nitrocellulose
Which of the following types of cells are not contained in plasma? A.Phagocytes B.Leukocytes C.Platelets D.Erythrocytes
A.Phagocytes
Which barbiturate is absorbed more slowly than the others? A.Phenobarbital B.Secobarbital C.Pentobarbital D.Amobarbital
A.Phenobarbital
If an investigator is to prepare standards from a suspect typewriter, which procedure is recommended? A.Prepare at least one copy of the text in full word-for-word order B.Partial copies of the suspect text are to be typed in light, medium, and heavy touches C.Examine the type impressions left on the ribbon D.Each character should be typed without the ribbon
A.Prepare at least one copy of the text in full word-for-word order
Which of the following statements is true of DNA segments that contain repeating base sequences? A.Repeating sequences act as filler or spacers between the coding regions of DNA B.Less than 20 percent of the human genome is composed of DNA strands that contain repeating base sequences C.Repeating base sequences are visualized as a cluster of circles D.The number and type of repeats varies in all humans
A.Repeating sequences act as filler or spacers between the coding regions of DNA
Which would be LEAST useful in identifying a mineral crystal? A.Size B.Color C.Refractive index D.Geometric shape
A.Size
Which of the following statements is false? A.Spermatozoa can generally be found in the vagina of a living female after 3 days B.Semen is unequivocally identified by the presence of spermatozoa C.The likelihood of finding seminal acid phosphatase in vaginal swabs decreases with time D.Semen will contain the enzyme p30
A.Spermatozoa can generally be found in the vagina of a living female after 3 days
Which of the following depicts correct base-pairing in DNA? A.T-A B.C-T C.G-A D.A-U
A.T-A
Assume that two strands of DNA have been separated and that the base sequence on one strand is ATGC. State the sequence of bases on the second strand. A.TACG B.GCAT C.TGGC D.ACTC
A.TACG
A fuel can only achieve combustion in: A.The gaseous state B.The liquid state C.The solid state D.A liquid-solid phase
A.The gaseous state
The minimum temperature at which a fuel will spontaneously ignite is called: A.The ignition temperature B.A dangerous place to store flammable liquids C.The flash point D.The heat of combustion
A.The ignition temperature
Alcohol is oxidized in the body primarily in: A.The liver B.The lungs C.The small intestine D.The stomach
A.The liver
Which of the following statements is false? A.The Kastle-Meyer test is used to determine whether blood is of human origin B.All bloods contain the enzyme peroxidase C.Dried bloodstains may tentatively be identified as blood by a peroxidase test D.A-B-O antigens are present in all human blood
A.The Kastle-Meyer test is used to determine whether blood is of human origin
What is radiation? A.Transfer of heat energy from a heated surface to a cooler surface B.Transfer of heat energy by movement of molecules within a liquid or gas C.Movement of heat through a solid object D.None of the above
A.Transfer of heat energy from a heated surface to a cooler surface
A TTI is a characteristic of a fax document. A.True B.False
A.True
After the paint has been applied to a surface, the solvent evaporates. A.True B.False
A.True
Alcohol tends to be distributed throughout the watery parts of the body. A.True B.False
A.True
An adequate number of exemplars is critical for determining the outcome of a comparison. A.True B.False
A.True
An atom has a net zero electrical charge, which indicates that it contains the same number of protons and electrons. A.True B.Fase
A.True
Examination of toner typically involves microscopic analysis followed by identification of the inorganic and organic components. A.True B.False
A.True
Few substances enter and completely leave the body in the same chemical state. A.True B.False
A.True
Field sobriety tests include psychophysical tests and a breath test. A.True B.False
A.True
For a longer total time required for complete absorption, the peak blood-alcohol concentration will be lower. A.True B.False
A.True
Gamma rays are a high-energy form of electromagnetic radiation. A.True B.False
A.True
Gas chromatography cannot be considered an absolute means of identification. A.True B.False
A.True
Gel diffusion takes advantage of the fact that antibodies and antigens move toward one another on a plate. A.True B.False
A.True
Infrared luminescence can reveal writing that has been erased. A.True B.False
A.True
Isotopes have different atomic mass numbers. A.True B.False
A.True
Microcrystalline tests are far less sensitive than color tests for blood identification. A.True B.False
A.True
Most human cells contain forty-six chromosomes, arranged in twenty-three mated pairs. A.True B.False
A.True
No two specimens of writing prepared by one person are ever identical in every detail. A.True B.False
A.True
One of the most frequent uses of the EMIT technique in forensic laboratories has been for screening the urine of suspected marijuana smokers. A.True B.False
A.True
Physical dependence develops only when the drug user uses a drug on a regular schedule. A.True B.False
A.True
Resin has higher concentrations of THC than the flowers of the Cannabis plant. A.True B.False
A.True
Standard/reference soil samples should be collected at the site of the crime at various intervals within a 100-foot radius of the crime scene. A.True B.False
A.True
The blood factors belonging to the A-B-O system are the most important for properly matching a donor and recipient for a transfusion. A.True B.False
A.True
The concentration of a drug present in urine is a poor indicator of how extensively an individual's behavior or state is influenced by the drug. A.True B.False
A.True
The concentration of the absorbing element is directly proportional to the quantity of the light absorbed. A.True B.False
A.True
The investigator should not try to remove trace paint evidence found on a tool but package the tool for laboratory examination instead. A.True B.False
A.True
The most common features associated with a paper examination are general appearance, color, weight, and watermarks. A.True B.False
A.True
The presence of prostate specific antigen (PSA) or p30 is useful for identifying a sample stain containing semen. A.True B.False
A.True
The two general categories of printers are impact and nonimpact printers. A.True B.False
A.True
The variety of coatings applied to the body of an automobile adds significant diversity to automobile paint and contributes to the forensic significance of automobile paint comparisons. A.True B.False
A.True
Two analytical techniques used to analyze writing inks are microspectrophotometry and thin-layer chromatography. A.True B.False
A.True
Type O blood is the most common in the United States. A.True B.False
A.True
Angularity, slope, and speed are examples of individual variations. A.True B.False
A.True
________ region(s) of mitochondrial DNA have been found to be highly variable in the human population for forensic determinations. A.Two B.Three C.One D.Four
A.Two
Each cycle of the DNA Thermal Cycler takes approximately: A.Two minutes B.Four hours C.Two hours D.30 seconds
A.Two minutes
Which of the following, if blood is not available, can the medical examiner NOT use in order to determine the body's alcohol content to a reasonable degree of accuracy? A.Urine B.Cerebrospinal fluid C.Vitreous humor D.Brain tissue
A.Urine
About 95-98 percent of alcohol is oxidized to what two substances? A.Water and carbon dioxide B.Water and acetic acid C.Acetaldehyde and acetic acid D.Carbon dioxide and dehydrogenase
A.Water and carbon dioxide
Which of the following statements is true of the headspace technique? A.When an airtight container containing the sample is heated, volatile residue in the debris is driven off and trapped in the container's enclosed airspace B.The headspace technique involves placing a charcoal-coated strip within the container that holds the debris in it C.The first step of the headspace technique involves the use of refrigeration in order to reduce the temperature of a container that contains the sample D.An advantage of using the headspace technique with gas chromatography is its sensitivity
A.When an airtight container containing the sample is heated, volatile residue in the debris is driven off and trapped in the container's enclosed airspace
DNA analysts are able to examine samples containing as few as ________ cells for an STR profile. A.800 B.18 C.180 D.36
B.18
The amplification of DNA using the Thermal Cycler takes approximately: A.Two hours B.30 cycles C.Four cycles D.Two minutes
B.30 cycles
Most explosives can be recovered from debris for future study by being rinsed with: A.Toluene B.Acetone C.Water D.Kerosene
B.Acetone
Small amounts of blood are best submitted to a crime laboratory: A.Immediately while still wet B.After dried C.In a druggists fold D.After removal from surface of deposition and rehydration
B.After dried
Which is the most widely used and abused drug? A.Marijuana B.Alcohol C.Heroin D.Cocaine
B.Alcohol
Which statement regarding STRs is true? A.Typically a core repeat sequence would consist of 15-30 bases B.All humans have the same type of STRs C.There is little variation in the number of repeats from person to person D.Restriction enzymes are used to cut STRs from the DNA helix
B.All humans have the same type of STRs
Which of the following is synthetically produced and does not occur naturally? A.Cocaine B.Amphetamine C.Morphine D.Opium
B.Amphetamine
Portions of the DNA molecule useful for DNA typing: A.Are useful for recombinant DNA B.Are repeated many times C.Are useful for the production of insulin D.Code for the production of proteins
B.Are repeated many times
The Dillie-Koppanyi reagent is useful in screening for: A.Marijuana B.Barbiturates C.Opiates D.Amphetamines
B.Barbiturates
Which is NOT a high explosive? A.TNT B.Black powder C.Dynamite D.RDX
B.Black powder
"Designer" drugs are: A.Very often used in the fashion industry B.Chemically related to controlled substances C.High-end products of the major pharmaceutical companies D.Often abused by the wealthy
B.Chemically related to controlled substances
Scott Test solutions can indicate the presence of: A.Codeine B.Cocaine C.Marijuana D.Librium
B.Cocaine
Which type of test would logically be used first by the drug analyst? A.Microcrystalline B.Color C.Gas chromatography D.TLC
B.Color
The transfer of heat energy by the movement of molecules within a liquid or gas is: A.Radiation B.Convection C.Oxidation D.Conduction
B.Convection
Water being heated on a stove illustrates the concept of: A.Radiation B.Convection C.Conduction D.All of the above
B.Convection
The Reinsch test would NOT be used to detect: A.Bismuth B.Copper C.Arsenic D.Mercury
B.Copper
The individuality of an organism is determined by the organism's: A.Nitrogenous bases B.DNA nucleotide sequence C.Environment D.Amino acids
B.DNA nucleotide sequence
Blood is drawn from a living suspect involved in an automobile accident. If the specimen is kept unrefrigerated and at a moderately warm temperature the alcohol concentration can be expected to: A.Either increase or decrease with time B.Decrease with time C.Remain unchanged D.Increase with time
B.Decrease with time
Whole blood collected for DNA typing purposes must be placed in a vacuum containing the preservative: A.Rh factor B.EDTA C.Ethylene glycol D.CODIS
B.EDTA
Which coating provides resistance to corrosion? A.Clearcoat B.Electrocoat primer C.Basecoat D.Primer surface
B.Electrocoat primer
Gamma rays are: A.Neutrons B.Electromagnetic radiation C.Protons D.Electrons
B.Electromagnetic radiation
An element is selective in the frequency of light it will absorb. This selectivity is due to its: A.Number of neutrons B.Electron energy levels C.Proton cloud D.Atomic mass
B.Electron energy levels
The emission spectrograph is used to determine the: A.Crystalline structure of a substance B.Elemental composition of a substance C.Weight of a substance D.Mass of a substance
B.Elemental composition of a substance
A TTI cannot be used to distinguish between a real and a fraudulently prepared fax document. A.True B.False
B.False
A continuous spectrum is most helpful in identifying a particular element because it serves as a unique "fingerprint" of an element. A.True B.False
B.False
All atoms of an element have the same number of neutrons. A.True B.False
B.False
Alpha particles are a form of radiation consisting of electrons. A.True B.False
B.False
An antigen is a protein that destroys or inactivates a specific antibody. A.True B.False
B.False
Aspermia is an abnormally low sperm count. A.True B.False
B.False
Biological evidence should be packaged in plastic or airtight containers. A.True B.False
B.False
Chromosomes are the fundamental units of heredity. A.True B.False
B.False
Emission spectroscopy measures the frequency of light emitted by an atom when one of its electrons moves to a higher orbital. A.True B.False
B.False
If soil is found adhering to an object, the investigator should remove the soil particles from the object and send them to the laboratory. A.True B.False
B.False
Indented writings are not readable under any typical examinations. A.True B.False
B.False
Information about when the victim last had consensual sex is not useful for evaluating the significance of findings during a possible rape examination. A.True B.False
B.False
It is not necessary that the collected paint from a vehicle involved in a hit-and-run accident be close to the area of the car suspected of being in contact with the victim. A.True B.False
B.False
Longer DNA strands are more stable and less subject to degradation than shorter strands. A.True B.False
B.False
Many chemical substances have similar mass spectra fragmentation. A.True B.False
B.False
Nonimpact printers include thermal and dot-matrix printers. A.True B.False
B.False
Nonmotile sperm generally survive for up to four to six hours in the vaginal cavity of a living female. A.True B.False
B.False
People with type O blood have both A and B antigens on their red blood cells. A.True B.False
B.False
Psychological dependence is defined as the physiological need for a drug that has been brought about by its regular use. A.True B.False
B.False
Surface texture is the most important of the characteristics that a criminalist looks for when comparing paint chips. A.True B.False
B.False
The distribution of a substance between a mobile and stationary phase describes spectrophotometry. A.True B.False
B.False
The first step in a forensic soil comparison is analysis of the size of the particles. A.True B.False
B.False
The minerals found in different soil samples cannot effectively be used to determine whether or not they have the same origin. A.True B.False
B.False
The most common color test for bloodstains is Luminol. A.True B.False
B.False
The number of protons in the nucleus of an atom is called the atomic mass number. A.True B.False
B.False
The three most widely used screening tests are thin-layer chromatography (TLC), gas chromatography (GC), and liquid chromatography (LC). A.True B.False
B.False
The implied-consent law allows the operator of a motor vehicle on a public highway to refuse a test for alcohol intoxication. A.True B.False
B.False
Variations in vertical and horizontal alignment cannot be used to identify a typewriter. A.True B.False
B.False
When comparing sample writing to a suspect document, the age difference between the documents should be no more than six to twelve months. A.True B.False
B.False
When two different genes are inherited, the characteristic coded for by a recessive gene is expressed. A.True B.False
B.False
Margins, spacing, crowding, insertions, alignment, spelling, punctuation, phraseology, and grammar cannot impart individual variations. A.True B.False
B.False
The TTI is a characteristic used to distinguish: A.Photocopiers B.Fax machines C.Computer printers D.All of the above
B.Fax machines
With regard to the constitutionality of obtaining handwriting exemplars, the courts have ruled all of the following EXCEPT: A.It is not in violation of Fourth Amendment rights B.Fifth Amendment privileges apply C.Such action does not constitute unreasonable search and seizure of a person D.None of the above
B.Fifth Amendment privileges apply
When investigators search a fire scene, the first focus must be on: A.Taking photographs and making sketches B.Finding the origin of the fire C.Interviewing eyewitnesses D.All of the above
B.Finding the origin of the fire
What is the concentration at which a vapor-to-fuel mixture in the air is capable of burning? A.Spontaneous concentration B.Flammable range C.Lethal range D.Heat of combustion
B.Flammable range
All combustible fuels simultaneously igniting to engulf a structure in flames is known as: A.Combustion B.Flashover C.Spontaneous combustion D.Pyrolysis
B.Flashover
Which instrumentation is considered the most sensitive and reliable for detecting and characterizing flammable residues? A.TLC B.GC C.IR D.NAA
B.GC
In neutron activation analysis, an element is identified by measuring the energy of emitting: A.Protons B.Gamma rays C.Electrons D.Neutrons
B.Gamma rays
Neutron activation analysis involves bombarding specimens with neutrons and then measuring the resultant: A.Beta particles B.Gamma rays C.X-rays D.Alpha particles
B.Gamma rays
Means to detect the amelogenin gene are included in commercial STR kits used in crime labs because the gene allows determination of: A.Ethnicity B.Gender C.Blood type D.Eye color
B.Gender
Which is a chemical used to synthesize the explosive TATP? A.Potassium chlorate B.Hydrogen peroxide C.Aluminum D.Magnesium
B.Hydrogen peroxide
Drugs deemed to have the highest potential for abuse and having a current medical use are listed in which schedule of the Controlled Substances Act? A.I B.II C.III D.IV
B.II
Which absorption spectrum is equivalent to a "fingerprint" of a substance and can be used for identification purposes? A.UV B.IR C.X-ray D.Visible
B.IR
Document examiners frequently uncover the original writing of words that have been crossed out with the aid of: A.Side lighting B.Infrared radiation C.Transmitted radiation D.Color photography
B.Infrared radiation
Which is a device used to screen objects for the presence of explosive residues? A.X-ray diffraction B.Ion-mobility spectrometry C.Infrared spectrophotometry D.Mass spectrometry
B.Ion-mobility spectrometry
Atoms having the same atomic number but different atomic masses are called: A.Isomers B.Isotopes C.Isotherms D.Isobars
B.Isotopes
The atoms of hydrogen, deuterium, and tritium all have the same number of protons, but differ in the number of neutrons they possess. These substances are: A.Compounds B.Isotopes C.Molecules D.Elements
B.Isotopes
Which of the following is true of the drug recognition expert program? A.It can suggest the presence of 15 broad categories of drugs B.It can supply credible evidence that a suspect was impaired at a specific time C.It was created to replace toxicological testing D.It can accurately determine which specific drug was ingested and when it was ingested
B.It can supply credible evidence that a suspect was impaired at a specific time
Examples of secondary explosives do NOT include: A.PETN B.Lead azide C.RDX D.TNT
B.Lead azide
The discriminating power of mtDNA is ________ the discriminating power of STR analysis. A.The same as B.Less than C.Greater than D.None of the above
B.Less than
he rate of alcohol absorption on a full stomach is ________ the rate of absorption on an empty stomach. A.Greater than B.Less than C.The same as D.None of the above
B.Less than
Complex chromatographic accelerant patterns can be simplified by: A.Gas chromatography B.Mass spectrometry C.Headspace analysis D.Thin-layer chromatography
B.Mass spectrometry
The administration of which drug eliminates an addict's desire for heroin? A.Morphine B.Methadone C.OxyContin D.Codeine
B.Methadone
Upon entering the bloodstream, heroin is almost immediately metabolized into: A.Procaine B.Morphine C.Cocaine D.Opium
B.Morphine
Which of the following is a non-destructive technique for identifying and quantifying trace elements in a test sample? A.ICP emission spectrometry B.Neutron activation analysis C.Carbon arc emission spectrometry D.Infrared spectrophotometry
B.Neutron activation analysis
The building blocks of the DNA molecule are known as: A.Amino acids B.Nucleotides C.Polysaccharides D.Hydrocarbons
B.Nucleotides
Which hallucinogen can be synthesized by a simple chemical process and is often manufactured in clandestine laboratories? A.Mescaline B.PCP C.Marijuana D.LSD
B.PCP
Which are common chemical ingredients of black powder? A.Carbon, nitrocellulose, potassium chlorate B.Potassium nitrate, charcoal, sulfur C.Aluminum, potassium, nitrate, nitrocellulose D.Sulfur, carbon, nitrogen
B.Potassium nitrate, charcoal, sulfur
Which part of cannabis contains the LEAST amount of THC? A.Resin B.Seeds C.Flower D.Leaf
B.Seeds
Acid-phosphatase is a major constituent of: A.Perspiration B.Semen C.Saliva D.Blood
B.Semen
Methamphetamine is a: A.Depressant B.Stimulant C.Hallucinogen D.Tranquilizer
B.Stimulant
Which is a homemade explosive that has been used by terrorist organizations in the Middle East? A.RDX B.TATP C.PETN D.TNT
B.TATP
Fax machines print a header known as the ________ at the top of each fax page, which may become a very important point of comparison. A.TLC B.TTI C.ELD D.HTTP
B.TTI
Which of the following CANNOT be determined from a laboratory examination of evidence recovered from an arson? A.The ignition mechanism used by the arsonist B.The brand name of gasoline used to start the fire C.Origin of liquid gasolines D.The presence of gasoline, kerosene, or turpentine in debris
B.The brand name of gasoline used to start the fire
The quantity of heat from a chemical reaction comes from: A.The composition of the fuel-air mix B.The breaking and formation of chemical bonds C.The emission of radiation D.The presence of oxygen in the reaction
B.The breaking and formation of chemical bonds
The minimum temperature at which fuel vapor will ignite is known as: A.The boiling point B.The ignition temperature C.The flash point D.The glow temperature
B.The ignition temperature
Which of the following statements about mitochondrial DNA is incorrect? A.Many copies of mitochondrial DNA's hypervariable regions are made by PCR B.The number of repeat segments found in the hypervariable regions are used to type mitochondrial DNA C.Mitochondrial DNA is constructed in a loop configuration D.Mitochondrial DNA is located outside the cell's nucleus
B.The number of repeat segments found in the hypervariable regions are used to type mitochondrial DNA
Which statement about tandem repeats is NOT true? A.It is thought that they may act as spacers between the coded regions of DNA B.They are of no forensic interest C.Their origin is a mystery D.More than 30% of the human genome is composed of these repeating units
B.They are of no forensic interest
Which of the following is true of alcohol analysis using the oxidation method? A.This reaction is carried out in the presence of the coenzyme xanthine oxidase B.This reaction is carried out in the presence of the enzyme alcohol dehydrogenase C.The extent of this conversion is measured by a breathalyzer and is related to alcohol concentration D.This is the most commonly used approach in forensic laboratories
B.This reaction is carried out in the presence of the enzyme alcohol dehydrogenase
A typical STR DNA type emanating from a single individual shows a ________ band pattern. A.Three B.Two C.One D.Zero
B.Two
In which phenotype pairings can the genotypes of the individuals be directly known? A.Type A and type AB B.Type AB and type O C.Type A and type B D.Type B and type O
B.Type AB and type O
Which nitrogenous base is NOT found in DNA? A.Cytosine B.Uracil C.Adenine D.Thymine
B.Uracil
The DRE program incorporates standardized methods for examining suspects to determine: A.Whether they have ever taken one or more drugs B.Whether they are under the influence of one or more drugs C.Whether they are involved in the buying or selling of drugs D.Whether they are transporting any illegal substances
B.Whether they are under the influence of one or more drugs
Sam is a forensic toxicologist who is examining a body found at the scene of a fire. Although the body was not burnt; Sam felt that the most likely cause of death is asphyxiation as the red blood cells had a below normal count of pure hemoglobin. It was found that as the deceased was stuck in the fire and exposed to dangerous gases; there was not enough hemoglobin left to carry oxygen to the tissues. In this case, the deceased was exposed to the poison called ________. A.thallium B.carbon monoxide C.dimethylmercury D.arsenic
B.carbon monoxide
The presence of ________ indicates that a stain is seminal in nature. A.PGM B.p30 C.DNA D.Peroxidase
B.p30
The DOT set the maximum allowable blood alcohol concentration for commercial truck and bus drivers at: A.0.08%. B.0.02%. C.0.04%. D.0.05%
C.0.04%
The presence or absence of how many antigens determines an individual's blood type in the A-B-O system? A.0 B.1 C.2 D.3
C.2
How many different bases are associated with the makeup of DNA? A.3 B.5 C.4 D.6
C.4
If blood is found to have both A and B antigens it is typed as: A.A B.B C.AB D.O
C.AB
In the United States, the rarest blood type is: A.A B.B C.AB D.O
C.AB
In Western countries, the most heavily abused drug(s) is/are: A.Barbiturates B.Amphetamines C.Alcohol D.Tranquilizers
C.Alcohol
Which of the following statements is correct? A.All atoms of an element have an equal number of neutrons and electrons B.All atoms of an electron have the same number of neutrons C.All atoms of an element have the same number of protons D.All atoms of an element have the same atomic mass number
C.All atoms of an element have the same number of protons
When dictating to a person in order to obtain samples of handwriting, one should NOT: A.Dictate the contents of the text at least three times B.Use paper similar to that of the questioned document C.Allow the suspect to view the questioned document before dictating it D.Use a pen similar to that of the questioned document
C.Allow the suspect to view the questioned document before dictating it
Automobile finishes typically contain which layer(s)? A.Colorcoat B.Clearcoat C.An electrocoat primer, colorcoat, and clearcoat D.Electrocoat primer and colorcoat
C.An electrocoat primer, colorcoat, and clearcoat
Of the following, which is an acid drug? A.Methadone B.PCP C.Aspirin D.Cocaine
C.Aspirin
Paint as physical evidence is most frequently encountered in: A.Car theft B.Burglary C.A hit-and-run D.Both A and B
C.A hit-and-run
Which coat represents the "eye appeal"? A.Clearcoat B.Primer surface C.Basecoat D.Electrocoat primer
C.Basecoat
Type AB blood contains: A.Both anti-A and anti-B antibodies B.Anti-A antibodies and B antigens C.Both A and B antigens D.Anti-A antigens and anti-B antibodies
C.Both A and B antigens
The most satisfactory way of simultaneously separating and tentatively identifying drugs is by: A.Infrared spectrophotometry B.Ultraviolet spectrophotometry C.Chromatography D.Emission spectroscopy
C.Chromatography
Paint chips may be individualized to a single source by examining their: A.Relative size B.Infrared spectra C.Color and layer structure D.Ultraviolet spectra E.Pyrograms
C.Color and layer structure
Which property imparts paint with its most distinctive forensic characteristics? A.Texture B.Gloss C.Color-layer sequence D.Color
C.Color-layer sequence
What is the rapid combination of oxygen with a fuel, which produces a noticeable release of energy? A.The flash point B.Explosion C.Combustion D.Ignition
C.Combustion
Which of the following statements is true of examining the forensic properties of soil? A.A visual comparison of the color and texture of soil specimens is a long and intricate process B.Due to the low number of distinguishable soil colors, color comparison of soil is done very rarely C.Comparing rocks and minerals that are naturally present in soil provides evidential value D.Color comparisons of soil samples can be done when the soil is wet
C.Comparing rocks and minerals that are naturally present in soil provides evidential value
What is the logical first step in soil analysis? A.Examination of minerals and rocks under high-power magnification B.Examination for presence of debris under low-power magnification C.Comparison of dried soil sample for color and texture D.Use of the density-gradient tube technique
C.Comparison of dried soil sample for color and texture
Luminol can be used at crime scenes to: A.Locate latent prints that otherwise would be overlooked B.Light up the crime scene with a high degree of illumination C.Detect traces of blood without compromising potential DNA typing D.Make hair evidence fluoresce
C.Detect traces of blood without compromising potential DNA typing
What is the process by which the image is stored in memory by scanning and converting by computer into an array of digital intensity values called picture elements? A.Luminescence B.Pixelization C.Digitizing D.Adobe Photoshopping
C.Digitizing
Which is NOT a component of a nucleotide? A.Sugar B.Phosphorous containing group C.Double helix D.Nitrogenous base
C.Double helix
Defects that are reproduced by a photocopier onto a copied document may originate from defects in all of the following photocopier parts EXCEPT: A.Mechanical portions B.Glass plate C.Feed tray D.Inner cover
C.Feed tray
What is the minimum temperature at which a liquid fuel will produce enough vapor to burn? A.Critical temperature B.Sublimation temperature C.Flash point D.Ignition temperature
C.Flash point
Which is NOT a widely used screening tool in the toxicology lab? A.TLC B.Immunoassay C.GC-MS D.None of the above
C.GC-MS
Combustion occurring at the surface of a solid describes: A.Pyrolysis B.Flash point C.Glowing combustion D.Spontaneous combustion
C.Glowing combustion
The ease with which one can find individual variations in a typewritten document is ________ the ease of finding such defects in documents produced by business and personal computers. A.The same as B.Less than C.Greater than
C.Greater than
The specificity of microcrystalline tests is ________ the specificity of color tests. A.The same as B.Less than C.Greater than D.None of the above
C.Greater than
In DNA replication, polymerases: A.Enable the strands to unwind from the helix B.Separate the strands of the double helix C.Help assemble the new DNA strands in proper base sequence D.All of the above
C.Help assemble the new DNA strands in proper base sequence
The Marquis Reagent was used on drug evidence and it turned purple. The drug being tested could be: A.Cocaine B.Methadone C.Heroin D.Either A or B
C.Heroin
Some inks, when exposed to blue-green light, absorb ________ radiation and emit light. A.Polarized B.Visible C.Infrared D.Ultraviolet
C.Infrared
The property exhibited by some dyes that emit infrared light when exposed to blue-green light is known as: A.Digitizing. B.Microspectrophotometry C.Infrared luminescence D.Thin-layer chromatography
C.Infrared luminescence
The ability to make a positive identification of a drug using UV spectrophotometry is ________ the ability to make a positive identification using IR spectrophotometry. A.The same as B.Greater than C.Less than D.None of the above
C.Less than
The amount of DNA material required for STR analysis is ________ the amount of DNA required for RFLP analysis. A.Greater than B.The same as C.Less than D.None of the above
C.Less than
The ease with which a child's handwriting can be individualized is ________ the ease with which one can individualize an adult's handwriting. A.Greater than B.The same as C.Less than
C.Less than
The possibility of recognizing known writing habits in samples produced when a writer is under the influence of drugs or alcohol is ________ the possibility of recognizing known writing habits produced when the writer of a sample is not under the influence of drugs or alcohol. A.Greater than B.The same as C.Less than
C.Less than
TLC uses ________ as its moving phase. A.Silica gel B.A thin film C.Liquid D.A carrier gas
C.Liquid
Gas chromatography suffers a big drawback in that it does not produce specific identification. This problem is overcome by connecting the GC to a: A.HPLC. B.TLC. C.MS. D.GRIM 3
C.MS
The reagent used for the field test of heroin is: A.Duquenois-Levine B.Van Urk C.Marquis D.Scott reagent
C.Marquis
Blood samples taken for alcohol testing must be taken only with the driver's consent according to: A.The Fifth Amendment B.Schmerber v. California C.Missouri v. McNeely D.The Frye standard
C.Missouri v. McNeely
The concept of simultaneously extracting, amplifying, and detecting a combination of STRs is known as: A.THO1 B.Electrophoresis C.Multiplexing D.PCR
C.Multiplexing
Which of the following statements is FALSE? A.In the case of Gilbert v. California the court held that the taking of handwriting exemplars was not prohibited by the Fifth Amendment B.An inconclusive finding by a document examiner may be due to an insufficient number of known writings available for comparison C.Once adulthood is reached, an individual's handwriting generally will not change with age D.Any object that contains handwritten or typewritten markings whose source or authenticity is in doubt is a questioned document
C.Once adulthood is reached, an individual's handwriting generally will not change with age
Which chemical reaction is associated with a fire? A.Precipitation B.Reduction C.Oxidation D.None of the above
C.Oxidation
Which is often used as the explosive core in a detonating cord? A.C-4 B.TNT C.PETN D.RDX
C.PETN
When an animal is injected with an antigen, the animal will respond by producing: A.Monoclonal antibodies B.Agglutinates C.Polyclonal antibodies D.Both A and B
C.Polyclonal antibodies
Which is an explosive readily detonated by heat or shock? A.ANFO B.Secondary explosive C.Primary explosive D.Dynamite
C.Primary explosive
High explosives can be classified as either ________ or ________ explosives. A.Initial; secondary B.Civilian; military C.Primary; secondary D.Military grade; non-military grade
C.Primary; secondary
PSA (p30) is a: A.Blood enzyme used to discriminate bloodstains B.Polymorphic enzyme found in red blood cells C.Protein found in seminal plasma D.Protein specific to females
C.Protein found in seminal plasma
What is the decomposition of organic matter by heat? A.Radiation B.Combustion C.Pyrolysis D.Ignition temperate
C.Pyrolysis
The polymeric makeup of paint binders can readily be compared by: A.Microscopy B.Thin-layer chromatography C.Pyrolysis gas chromatography D.Emission spectroscopy
C.Pyrolysis gas chromatography
________ transport oxygen from the lungs to the body tissues and carry carbon dioxide back to the lungs. A.Lymphocytes B.Alveoli C.Red blood cells D.White blood cells
C.Red blood cells
Which is a natural heat-producing process that may give rise to a fire? A.Flash point B.Ignition point C.Spontaneous combustion D.Chain reaction
C.Spontaneous combustion
Paternity testing is done involving a woman with type AB blood who has accused a man with type B blood of fathering her child who has tested AB. What can be determined in this case? A.The child cannot belong to this mother B.The male is definitely NOT the father of the child C.The male could have fathered the child D.The male definitely IS the father of the child
C.The male could have fathered the child
Inks on handwritten documents may be compared for their chemical composition by the technique of: A.Ultraviolet spectrophotometry B.Infrared spectrophotometry C.Thin-layer chromatography D.None of the above
C.Thin-layer chromatography
Which statement is not correct for Y-STRs? A.Female STRs will not yield a Y-STR profile B.Y-STRs can be amplified by PCR C.Y-STR types are typically shorter in length as compared to X-STRs D.A typical Y-STR pattern has one band
C.Y-STR types are typically shorter in length as compared to X-STRs
In the PCR process, the first step is to heat the DNA strands. This is to permit the: A.Hybridization to take place B.Process to take place without DNA degradation C.Double-stranded molecules to separate completely D.DNA to coil very tightly in the helical shape
C.Double-stranded molecules to separate completely
The blood alcohol concentration level for being presumed to be legally "Under the Influence" in most states is: A.0.10% B.0.05% C.0.0% D.0.08%
D.0.08%
STRs normally consist of repeating sequences of: A.18-2 bases B.13-17 bases C.8-12 bases D.3-7 bases
D.3-7 bases
Which is NOT part of the composition of paint? A.Pigment B.Solvent C.Binder D.Adhesive
D.Adhesive
The technology of DNA typing had its beginnings in 1985 with the work of: A.Henry Lee B.James Watson C.Francis Crick D.Alec Jeffreys
D.Alec Jeffreys
A precipitin test can be used to identify: A.Human blood B.Dog blood C.Cat blood D.All of the above
D.All of the above
A stain can tentatively be identified as blood by: A.The benzidine test. B.The luminol test. C.The phenolphthalein test. D.All of the above
D.All of the above
After examining small paint chips from an auto accident scene and using the PDQ database, the crime lab worker can determine the ________ of the vehicle. A.Model B.Year C.Make D.All of the above
D.All of the above
Alcohol is eliminated from the body chemically unchanged in: A.Perspiration B.Breath C.Urine D.All of the above
D.All of the above
Analyzing segments of hair for drug content may define the timeline for drug use, dating it back over a period of: A.Days B.Years C.Weeks D.All of the above
D.All of the above
Arson investigators must work quickly to collect evidence at a fire scene because: A.Safety requirements may require that cleanup and salvage operations begin quickly B.Accelerants in soil may rapidly degrade C.Accelerant residues may quickly evaporate D.All of the above
D.All of the above
Barbiturates act to: A.Produce sleep. B.Promote relaxation. C.Create a feeling of well-being. D.All of the above
D.All of the above
During the production of monoclonal antibodies, which step is not followed? A.Fuse the spleen cells to malignant blood cells. B.Remove the animal's spleen cells. C.Inject an animal with the antigen of interest. D.All of the above
D.All of the above
Electrophoresis can be used in the crime lab to analyze: A.Proteins B.DNA C.Dried blood D.All of the above
D.All of the above
Evidence to substantiate that a rape occurred could include: A.Fibers B.Hairs C.Blood and semen D.All of the above
D.All of the above
Factors that can contribute to abnormal observations at a fire scene include: A.Winds or drafts B.Stairways or elevator shafts C.Secondary fires due to collapsing floors or roof D.All of the above
D.All of the above
In dealing with fax machines, photocopiers, and computer printers, which class characteristics might be examined? A.Type of toner-to-paper fusing method B.Chemical composition of toner C.Type of paper D.All of the above
D.All of the above
In routine blood banking, which antigen(s) must be determined in testing for compatibility? A.A B.B C.D D.All of the above
D.All of the above
Information from the Human Genome Project will: A.Be useful for diagnosing and treating genetic diseases B.Help to reveal the role and implications of evolution C.Reveal the location of a gene on a particular chromosome D.All of the above
D.All of the above
Most narcotics are: A.Depressants to the central nervous system B.Obtained from opium C.Physically addicting D.All of the above
D.All of the above
Questioned documents include: A.Petitions and lottery tickets. B.Letters and checks. C.Contracts and passports. D.All of the above
D.All of the above
Radioactivity is composed of: A.Gamma rays. B.Alpha particles. C.Beta particles. D.All of the above
D.All of the above
STR analysis has replaced other DNA typing techniques because it: A.Can be implemented using the PCR B.Requires a smaller sample size C.Is less subject to sample degradation D.All of the above
D.All of the above
Telltale signs of arson include: A.Trails of burn patterns B.The presence of containers C.Separate points of origin D.All of the above
D.All of the above
The Controlled Substance Act established five schedules of classification for substances based on the drugs: A.Potential for psychological dependence B.Medical value C.Potential for physical dependence D.All of the above
D.All of the above
The separation of STRs using capillary electrophoresis: A.Is currently the preferred method B.Decreases analysis time C.Evolved from the flat-gel electrophoresis approach D.All of the above
D.All of the above
The sniffing of volatile solvents can cause: A.Drowsiness and stupor B.Slurred speech and double vision C.Feelings of exhilaration and euphoria D.All of the above
D.All of the above
The writing characteristics of a person may be altered by whether: A.Pencil, ballpoint, or fountain pen is used B.The paper is ruled or unruled C.The posture or stance of the author varies between writings D.All of the above
D.All of the above
What is true about monoclonal antibodies? A.They are produced utilizing rapidly multiplying blood-cancer cells. B.They are expected to be medicine's version of the "magic bullet." C.They are produced by injecting a mouse with an antigen. D.All of the above
D.All of the above
What type of evidence would be expected to have trace elements? A.Glass and metal objects B.Paint and bullet fragments C.Soil and gun primer particles D.All of the above
D.All of the above
Which are important characteristics of a printer, photocopier, or fax machine? A.Type of paper B.Printing technology C.Type of toner or ink used D.All of the above
D.All of the above
Which is an advantage of working with short DNA fragments? A.They are less subject to degradation due to adverse environmental conditions B.Their quantity can be greatly amplified by PCR technology C.They are more stable and less likely to break apart D.All of the above
D.All of the above
Which of the following are considered to be "club drugs"? A.Rohypnol B.MDMA C.Ketamine D.All of the above
D.All of the above
Which of the following is a poor conductor of heat? A.Wood B.Plastic C.Paper D.All of the above
D.All of the above
Which of the following is considered to be a hallucinogen? A.Mescaline B.Psilocybin C.Phencyclidine (PCP) D.All of the above
D.All of the above
Which physical symptom is part of the abstinence syndrome? A.Convulsions B.Body chills C.Stomach cramps and vomiting D.All of the above
D.All of the above
Which type(s) of screening and confirmation tests are used for analyzing evidence of explosives? A.TLC B.Gas chromatography/mass spectrometry C.Color spot tests D.All of the above
D.All of the above
Which is NOT a factor in determining the rate at which alcohol is absorbed into the bloodstream? A.The amount consumed B.The presence or absence of food in the stomach C.The alcoholic content of the beverage D.All of the above are factors
D.All of the above are factors
After a blood sample is collected for alcohol testing, a(n) ________ is added to stop the blood from clotting. A.Monochromator B.Fuel cell C.Preservative D.Anti-coagulant
D.Anti-coagulant
Which coating helps resist UV radiation and acid rain? A.Primer surface B.Clearcoat C.Electrocoat primer D.Basecoat
D.Basecoat
Hydrocarbon accelerants can be detected by: A.Trained dogs B.A portable detector (sniffer) C.Most people D.Both A and B
D.Both A and B
Infrared luminescence is used to: A.Detect if two different inks were used in the writing of a document. B.Reveal writing that has been erased. C.Prepare ink for thin-layer chromatography. D.Both A and B
D.Both A and B
Which component of DNA forms the backbone of the molecule? A.Sugar B.Nitrogenous base C.Phosphate group D.Both A and C
D.Both A and C
Paint binders can be chemically analyzed using: A.TLC B.IR spectrophotometry C.Pyrolysis GC D.Both B and C
D.Both B and C
The molecular structure of DNA was deduced by: A.Gregor Mendel B.James Watson C.Francis Crick D.Both B and C
D.Both B and C
Which blood components are directly pertinent to the forensic aspects of blood identification? A.Platelets B.Blood serum C.Red blood cells D.Both B and C
D.Both B and C
Which is the most widely used low explosive? A.Potassium chlorate and sugar B.Black powder C.Smokeless powder D.Both B and C
D.Both B and C
A common classification system characterizes ignitable liquids based on their boiling point ranges and number of ________ molecules as light, medium, and heavy petroleum distillates. A.Petroleum B.Petrol C.Hydrogen D.Carbon
D.Carbon
Carbon monoxide is toxic because it: A.Causes platelets to clump B.Activates killer white blood cells C.Destroys red blood cells D.Combines with hemoglobin to form carboxyhemoglobin
D.Combines with hemoglobin to form carboxyhemoglobin
The speed in a low explosive is called the speed of: A.Detonation B.Oxidation C.Combustion D.Deflagration
D.Deflagration
In a simple emission spectrograph, excitation of the specimen under investigation is accomplished with a(n): A.Inductive magnetic field B.Hot plasma torch C.Activated prism D.Electrical arc
D.Electrical arc
Field sobriety tests that can be employed to ascertain the degree of an individual's alcohol impairment normally do not include the following: A.Walk and turn B.Portable, roadside breath tester C.Horizontal gaze nystagmus D.Gas chromatography
D.Gas chromatography
In the case of ________, the Supreme Court held handwriting to be nontestimonial evidence not protected by Fifth Amendment privileges. A.United States v. Mara B.United States Secret Service v. Mara C.Carmichael v. Kumho Tire Co. D.Gilbert v. California
D.Gilbert v. California
A police officer performs a field test on a white powder, obtaining a purple color. The most likely drug present is: A.Cocaine B.LSD C.Methadone D.Heroin
D.Heroin
What is the major advantage of using the vapor concentration technique with gas chromatography? A.Low resolution of peaks associated with volatile residues B.Only non-volatile residues will be detected C.Ability to determine relative concentration of solid residues D.High sensitivity for detecting volatile residues
D.High sensitivity for detecting volatile residues
EMIT is NOT a(n): A.Speedy test to detect methadone in urine B.Screening test for suspected marijuana smoking C.Immunological assay technique that utilizes antibodies D.Highly specific process to identify drugs in blood
D.Highly specific process to identify drugs in blood
A gene pair made up of two similar alleleslong dash—for example, AA and BBlong dash—is said to be: A.Monoclonal B.Complementary C.Heterozygous D.Homozygous
D.Homozygous
The tranquilizers Valium and Librium are classified in which schedule of the Controlled Substances Act? A.I B.II C.III D.IV
D.IV
Antibodies are found: A.In the red blood cells B.In the solid portion of blood C.In the white blood cells D.In the blood serum
D.In the blood serum
Which is an initiating explosive often used in detonators? A.PETN B.Dynamite C.TNT D.Lead azide
D.Lead azide
An individual who is type O has: A.A antibodies B.O antibodies C.B antibodies D.Neither A nor B antibodies
D.Neither A nor B antibodies
Overwriting or crossing out writing is known as: A.Erasure B.Indentation C.Alteration D.Obliteration
D.Obliteration
Many explosives must have their own source of: A.Fuel B.Heat C.Energy D.Oxygen
D.Oxygen
The presence of high levels of carbon monoxide in the blood of a victim found at the scene of a suspicious fire is proof that the victim: A.Was the arsonist B.Died elsewhere and was brought to the fire scene after death C.Died before the fire started D.Perished after the fire started
D.Perished after the fire started
The nucleus of an atom contains: A.Protons and electrons B.Neutrons C.Neutrons and electrons D.Protons and neutrons
D.Protons and neutrons
HV1 and HV2 are: A.STR types B.Types of viruses C.Restriction enzymes D.Regions of mtDNA
D.Regions of mtDNA
David dissolves a sample of muscle tissue of a suspect in a hydrochloric acid solution and inserts a copper strip into the solution. David notices that the copper strip starts to develop a dark coating. The appearance of the dark coating indicates the presence of a heavy metal in the tissue. This procedure is known as the ________ test. A.Scott B.Greiss C.Romberg D.Reinsch
D.Reinsch
A compound can tentatively be identified by gas chromatography from its: A.Rf value B.Carrier gas C.Partition coefficient D.Retention time
D.Retention time
The D antigen is also known as the ________ antigen. A.Monoclonal B.X C.AB D.Rh
D.Rh
The specific proteins produced by a cell are directly related to the: A.Sequence of sugars and phosphates in the cell B.Length of the chromosomes C.Number of mitochondria in the cell D.Sequence of nucleotides in the DNA of the cell
D.Sequence of nucleotides in the DNA of the cell
The drug recognition expert evaluation process can suggest the presence of how many broad categories of drugs? A.Nine B.Ten C.Four D.Seven
D.Seven
CODIS is a national system of: A.Crime laboratory directors B.Vastly enhanced 911 emergency systems C.Computers to track the movement of sex offenders released from prison D.Shared databases of DNA typing information from convicted felons and crime scene evidence
D.Shared databases of DNA typing information from convicted felons and crime scene evidence
In which hereditary disease does abnormal hemoglobin differ from normal hemoglobin by only a single amino acid? A.Albinism B.Hemophilia C.Phenylketonuria D.Sickle-cell anemia
D.Sickle-cell anemia
A databank of ink dye patterns has been established by the U.S. Treasury Department using: A.TTI B.NAA C.HPLC D.TLC
D.TLC