CH 9-12 EXAM 3
34. Duquenois-Levine solutions were used on a sample and the chloroform layer turned purple. This suggests that the tested substance is: a. Marijuana. b. Cocaine. c. Valium. d. Heroin.
a. Marijuana.
55. The reagent used for the field test of heroin is: a. Marquis b. Duquenois-Levine c. Scott reagent d. Van Urk
a. Marquis
15. The administration of which drug eliminates an addict's desire for heroin? a. Methadone b. Morphine c. OxyContin d. Codeine
a. Methadone
48. Heroin is a chemical derivative of: a. Morphine b. Barbituric acid c. Codeine d. Methadone
a. Morphine
Upon entering the bloodstream, heroin is almost immediately metabolized into: a. Morphine. b. Procaine. c. Opium. d. Cocaine.
a. Morphine.
Before the 20th century, all fibers were: a. Natural. b. Regenerated. c. Synthetic. d. Derived.
a. Natural.
12. Which part of cannabis contains the LEAST amount of THC? a. Seeds b. Flower c. Leaf d. Resin
a. Seeds
26. Most often, cocaine is: a. Snorted. b. Smoked. c. Injected. d. Swallowed.
a. Snorted.
The physical state that has both shape and volume is a: a. Solid. b. Liquid. c. Gas. d. Vapor.
a. Solid
25. Cocaine is a(n): a. Stimulant. b. Opiate. c. Depressant. d. Hallucinogen.
a. Stimulant.
27. The most difficult drug addiction to overcome is that of: a. Nicotine. b. Alcohol. c. Crack cocaine. d. Heroin.
c. Crack cocaine.
Beard hairs are coarse and normally _____ in cross-section. a. Ribbon-like b. Oval c. Triangular d. Round
c. Triangular
Which color of the visible spectrum has the highest frequency and the shortest wavelength? a. Red b. Green c. Violet d. Yellow
c. Violet
The DRE program incorporates standardized methods for examining suspects to determine: a. Whether they are transporting any illegal substances. b. Whether they are involved in the buying or selling of drugs. c. Whether they are under the influence of one or more drugs. d. Whether they have ever taken one or more drugs.
c. Whether they are under the influence of one or more drugs.
Cellulose is the basic component of: a. Sugar. b. Starch. c. Wood. d. Wool.
c. Wood.
Pyrex glass: a. Is put through an annealing process. b. Has been tempered. c. Is made with the addition of boron oxide. d. Is laminated.
c. is made with the addition of boron oxide
The fracture pattern of glass usually has: a. Radial lines. b. Concentric lines. c. Radial and concentric lines. d. Directional lines.
c. radial and concentric lines
If glass cannot be physically pieced together then the control and question glass are best compared as to their: a. Color and density. b. Weight and density. c. Refractive index and density. d. Refractive index and weight.
c. refractive index and density
What is the main ingredient in ordinary glass? a. Lime (CaO) b. Soda (NaCO) c. Sand d. Metal oxides
c. sand
For standard/reference hair sampling from a victim, the collection of a minimum of _____ full-length head hairs and _____ full-length pubic hairs is recommended. a. 50; 25 b. 100; 100 c. 20; 20 d. 5; 16
a. 50; 25
Mohair and cashmere are hairs from: a. A goat. b. A llama. c. A sheep. d. A camel.
a. A goat.
18. Which is the most widely used and abused drug? a. Alcohol b. Cocaine c. Heroin d. Marijuana
a. Alcohol
A criminalist is more likely to obtain DNA from hairs in the: a. Anagenic stage. b. Catagenic stage. c. Telogenic stage. d. Terminal stage.
a. Anagenic stage.
Of the following, which is an acid drug? a. Aspirin b. Cocaine c. Methadone d. PCP
a. Aspirin
In the collection of fiber evidence, great care should be taken to: a. Avoid cross-contamination of evidence. b. Shake off all garments to be sent for examination before neatly folding them. c. Send as much potential evidence as possible to the crime lab to ensure that nothing is missed. d. Package all items from each individual together in one bag to avoid later confusion.
a. Avoid cross-contamination of evidence.
It is a virtual certainty that two fabrics share a common origin if their fibers: a. Can be fitted together at their torn edges b. Have the same striations c. Have the same color d. Appear identical in cross section
a. Can be fitted together at their torn edges
19. A low dose of alcohol will NOT inhibit: a. Confidence b. Concentration c. Judgment d. Memory
a. Confidence
Pigment granules that impart hair with color are found in the: a. Cortex. b. Medulla. c. Cuticle. d. Both A and B
a. Cortex.
2. The pattern and intensity of dependency on a drug does NOT depend on the: a. Cost of the drug. b. Individual's rate of metabolism. c. Dose and route of administration. d. Frequency of administration.
a. Cost of the drug.
A breath test may be used to analyze: a. Ethyl alcohol. b. Marijuana. c. Barbiturates. d. All of the above
a. Ethyl alcohol.
40. Which technique allows for both separation and specific identification of a questioned mixture of substances? a. GC/MS b. GC c. UV spectrophotometry d. IR spectrophotometry
a. GC/MS
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. Infrared spectrophotometry. d. Ultra-violet spectrophotometry.
a. Gas chromatography.
32. The Marquis Reagent was used on drug evidence and it turned purple. The drug being tested could be: a. Heroin. b. Cocaine. c. Methadone. d. Either A or B
a. Heroin.
9. What is NOT true about codeine? a. It is stronger than morphine. b. It is prepared synthetically from morphine. c. It is present in opium. d. It is a component in over-the-counter cough medicine.
a. It is stronger than morphine.
35. The Van Urk reagent was used to test a sample and it turned bluish-purple. This indicates the presence of: a. LSD. b. MDMA. c. GHB. d. PCP.
a. LSD.
Which of the following is not classified as a heavy metal? a. Lead b. Arsenic c. Mercury d. Thallium
a. Lead
10. Which is the most widely used illicit drug in the United States today? a. Marijuana b. Heroin c. Cocaine d. Alcohol
a. Marijuana
One milliliter of a liquid is _____ 1cc of the same liquid. a. The same as b. Greater than c. Less than d. None of the above
a. The same as
The effect of gravity on the weight of an object is ________ the effect of gravity on the mass of the same object. a. The same as b. Less than c. Greater than d. None of the above
a. The same as
30. What is NOT true of the use of anabolic steroids? a. They can greatly enhance strength and general athletic performance. b. They can cause unpredictable effects on mood and personality. c. They can produce infertility and diminished sex drive in males. d. They can cause masculinizing effects in females.
a. They can greatly enhance strength and general athletic performance.
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
41. In reference to the diagram above, what is the correct sequence of impacts? a. a first b. b first c. a and b simultaneously d. Sequence impossible to determine
a. a first
Flotation is a method used by scientists to determine the _____ of a particle of glass. a. Density b. Refractive index c. Mass d. Weight
a. density
The change in refractive index for tempered glass upon annealing is _____ when compared to nontempered glass. a. Greater b. The same as c. Less than d. None of the above
a. greater
When a bullet penetrates a panel of glass, it leaves a crater-shaped hole that: a. Is wider on the exit side. b. Is wider on the entrance side. c. Forms randomly and hence the direction of impact cannot be determined by its appearance. d. a or c
a. is wider on the exit side
Which is a true statement about the fracturing of glass? a. Radial cracks appear first, starting on the side opposite the destructive force. b. Radial cracks form afterward, starting on the same side as the destructive force. c. Concentric fractures form first, starting on the side opposite the destructive force. d. Concentric fractures form first, on the same side as the destructive force.
a. radial cracks appear first, starting on the side opposite the destructive force
A hot-stage microscope or the GRIM 3 is used to determine the _____ of glass fragments. a. Refractive index b. Relative density c. Metallic oxide content d. Temperature
a. refractive index
The refractive index of a medium is determined by the ratio of: a. Velocity of light in a vacuum to velocity of light in a medium. b. Density of light in the medium to density of light in a vacuum. c. Frequency of light in a vacuum to frequency of light in a medium. d. Velocity of light in a vacuum to frequency of light in a medium.
a. velocity of light in a vacuum to velocity of light in a medium
The weight 264.45 grams can be correctly expressed as: a. 26,445 decigrams. b. 0.26445 kilograms. c. 26.445 centigrams. d. None of the above
b. 0.26445 kilograms
1. What is the percentage of evidence evaluated in the crime lab that is drug-related? a. 25% b. 75% c. 60% d. 35%
b. 75%
3. Use of which of the following drugs is LEAST likely to lead to psychological dependence? a. Codeine b. Alcohol c. Heroin d. Cocaine
b. Alcohol
In Western countries, the most heavily abused drug(s) is/are: a. Tranquilizers b. Alcohol c. Barbiturates d. Amphetamines
b. Alcohol
The monomers involved in the synthesis of proteins are: a. Sugars b. Amino acids c. Fatty acids d. Starches
b. Amino acids
49. Which of the following is synthetically produced and does not occur naturally? a. Cocaine b. Amphetamine c. Morphine d. Opium
b. Amphetamine
After a blood sample is collected for alcohol testing, a(n) _____ is added to stop the blood from clotting. a. Monochromator b. Anti-coagulant c. Preservative d. Fuel cell
b. Anti-coagulant
33. The Dillie-Koppanyi reagent is useful in screening for: a. Amphetamines. b. Barbiturates. c. Marijuana. d. Opiates
b. Barbiturates.
For the purpose of extracting the drug out of body tissues, an amphetamine is classified as an: a. Acid drug. b. Basic drug. c. Neutral drug. d. All of the above.
b. Basic drug.
The conviction of Ennis Cosby's killer was aided by the DNA analysis on a hair that was crucial evidence in the case. This hair: a. Belonged to Cosby and was found in the suspect's car. b. Belonged to the killer and was found in his cap with which he had wrapped the murder weapon before discarding it. c. Belonged to Cosby and was found clinging to the murderer's jacket. d. Belonged to the killer and was found on the body of the victim.
b. Belonged to the killer and was found in his cap with which he had wrapped the murder weapon before discarding it.
A regenerated fiber can be derived from: a. Polyester b. Cellulose c. Rayon d. Acetate
b. Cellulose
36. Scott Test solutions can indicate the presence of: a. Marijuana. b. Cocaine. c. Codeine. d. Librium.
b. Cocaine.
_____ is the visual effect caused by an object's absorption of certain portions of the visible light spectrum and transmission or reflection of others. a. Dispersion b. Color c. Density d. Refractive Index
b. Color
In making hair evaluations, it is best to view the hairs using a(n) _____ microscope. a. Scanning electron b. Comparison c. Stereoscopic d. Polarizing
b. Comparison
The Reinsch test would NOT be used to detect: a. Bismuth. b. Copper. c. Mercury. d. Arsenic.
b. Copper.
A fiber whose microscopic appearance includes being ribbon-like in shape (flat) with twists at irregular intervals is: a. Polyester. b. Cotton. c. Kapok. d. Linen.
b. Cotton.
Carbon monoxide combines with what component of blood? a. Carboxyhemoglobin b. Hemoglobin c. Oxyhemoglobin d. White blood cells
b. Hemoglobin
57. A police officer performs a field test on a white powder, obtaining a purple color. The most likely drug present is: a. Cocaine b. Heroin c. LSD d. Methadone
b. Heroin
Which of the following drugs is not found in blood or urine? a. Morphine b. Heroin c. Amphetamine d. Methadone
b. Heroin
44. 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
41. Which absorption spectrum is equivalent to a "fingerprint" of a substance and can be used for identification purposes? a. Visible b. IR c. UV d. X-ray
b. IR
29. MDMA (Ecstasy) does NOT cause: a. Increased heart rate and blood pressure. b. Increased inhibition. c. Confusion, anxiety, and paranoia. d. Hallucinogenic and amphetamine-like effects.
b. Increased inhibition.
39. 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. Less than c. Greater than d. None of the above
b. Less than
A piece of glass is immersed in a liquid. It proceeds to float on the liquid's surface. This shows that the density of the glass is _____ the density of the liquid. a. More than b. Less than c. Equal to d. Not comparable
b. Less than
The amount of alcohol absorbed through the stomach walls is _____ the amount of alcohol absorbed through the walls of the small intestine. a. The same as b. Less than c. Greater than d. None of the above
b. Less than
The medullary index of human hair is _____ the medullary index for most other animals. a. The same as b. Less than c. Greater than d. None of the above
b. Less than
The rate of alcohol absorption on a full stomach is _____ the rate of absorption on an empty stomach. a. The same as b. Less than c. Greater than d. None of the above
b. Less than
The basic metric unit for volume is the a. Centimeter. b. Liter. c. Milliliter. d. Gram.
b. Liter
42. 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. GRIM 3. b. MS. c. HPLC. d. TLC.
b. MS.
7. Which is NOT derived from opium? a. Morphine b. Marijuana c. Heroin d. Codeine
b. Marijuana
The central canal running through many hairs is known as the: a. Shaft. b. Medulla. c. Cuticle. d. Cortex.
b. Medulla.
A human hair in cross-section appeared flat in shape. The racial origin was most likely: a. Caucasian. b. Negroid. c. Indian. d. Mongoloid.
b. Negroid.
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. Died elsewhere and was brought to the fire scene after death. b. Perished after the fire started. c. Died before the fire started. d. Was the arsonist.
b. Perished after the fire started.
The cortex of hair derives its major forensic importance from the fact that it contains: a. Scales. b. Pigments. c. Medullae. d. DNA.
b. Pigments.
56. The most common diluent of heroin is: a. Mannitol b. Quinine c. Procaine d. Starch
b. Quinine
65. Thin-layer chromatography was performed and four spots were visualized on the glass slide. The substance with which Rf value was least soluble in the stationary phase? a. Rf value .7 b. Rf value .2 c. Rf value .5 d. Rf value 8.5
b. Rf value .2
Which feature of hair is MOST important in making a species identification? a. Follicle shape b. Scale pattern c. Bulb size d. Shaft length
b. Scale pattern
The drug recognition expert evaluation process can suggest the presence of how many broad categories of drugs? a. Nine b. Seven c. Four d. Ten
b. Seven
Of the following, which country has the lowest blood alcohol concentration in determining legal impairment level? a. Japan b. Sweden c. France d. United States
b. Sweden
The portion of the hair containing its scales is: a. The cortex. b. The cuticle. c. The medulla. d. The root.
b. The cuticle.
In determining whether a hair sample originated from a male or a female, the MOST important consideration is: a. Whether the hair is bleached. b. The results of DNA analysis performed on the root structure. c. Whether the hair was dyed. d. The length of the hair.
b. The results of DNA analysis performed on the root structure.
Which of the following questions cannot be answered with a microscopic examination of hair? a. Whether a hair came from a 25-year-old or an infant b. Whether a hair is from a man or a woman c. Whether a hair is from a scalp or a beard d. Whether the hair is consistent with Caucasian or Negroid hair
b. Whether a hair is from a man or a woman
If an object is immersed in a liquid of greater density, it will: a. Be suspended in the liquid b. Float c. Sink d. Be suspended for a known period of time before sinking
b. float
The density of water at 60°F is _____ the density of water at 28°F. a. Less than b. Greater than c. The same as d. None of the above
b. greater than
Which physical state has volume but no specific shape? a. Gas b. Liquid c. Solid d. No such state exists
b. liquid
Stress marks on the edge of a radial crack near the point of impact are: a. Perpendicular to the side on which the force was applied. b. Parallel to the side on which the force was applied. c. Parallel to the side opposite the side on which the force was applied. d. Perpendicular to the side of the glass facing outdoors.
b. parallel to the side on which the force was applied
The heat intensity (hotness) of water at 100°C is _____ the heat intensity of water at 212°F. a. Greater than b. The same as c. Less than d. None of the above
b. the same as
The elimination or "burn off" rate of alcohol averages _____ percent w/v per hour. a. 0.10 b. 0.15 c. 0.015 d. None of the above
c. 0.015
The blood alcohol concentration level for being presumed to be legally "Under the Influence" in most states is: a. 0.04 percent b. 0.05 percent c. 0.08 percent d. 0.10 percent
c. 0.08 percent
The rate of human hair growth per month is: a. 1 inch b. 1 mL c. 1 cm d. 1 dm
c. 1 cm
Which of the following is an element? a. Wood b. Water c. Aluminum d. Air
c. Aluminum
Which type of crime is LEAST likely to be solved with the use of fiber evidence? a. Breaking and entering b. Sexual assault c. Bombing d. Hit-and-run
c. Bombing
Hair can best be characterized as originating from an animal by examining: a. The medulla. b. The cuticle. c. Both the medulla and cuticle. d. Its color.
c. Both the medulla and cuticle.
The toxicologist's capabilities are NOT directly dependent on the input from the: a. Medical examiner. b. Police. c. Case prosecutor. d. Attending physician.
c. Case prosecutor.
A hair sample was examined and its medulla appeared to have a pattern described as resembling a string of pearls. It was most likely from a: a. Rabbit. b. Deer. c. Cat. d. Mouse.
c. Cat.
5. The use of which drug will NOT lead to physical dependence? a. Barbiturates b. Heroin c. Cocaine d. Alcohol
c. Cocaine
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. Remain unchanged. b. Increase with time. c. Decrease with time. d. Either increase or decrease with time.
c. Decrease with time.
62. Chromatography is NOT used to: a. Aid in analysis of illicit drug preparations. b. Separate molecules in a mixture. c. Determine colors of a compound. d. Tentatively identify molecules.
c. Determine colors of a compound.
There is a(n) _____ relationship between the amount of alcohol in the blood and that in the alveolar breath. a. Variable b. Indirect c. Direct d. Undetermined
c. Direct
Forcibly removed hairs are most likely to provide useful DNA evidence because they bear: a. Catagenic roots b. Telogenic roots c. Follicular tissue d. Mitochondria
c. Follicular tissue
Which is NOT a widely used screening tool in the toxicology lab? a. Immunoassay b. TLC c. GC-MS d. None of the above
c. GC-MS
Field sobriety tests that can be employed to ascertain the degree of an individual's alcohol impairment normally do not include the following: a. Portable, roadside breath tester. b. Horizontal gaze nystagmus. c. Gas chromatography. d. Walk and turn.
c. Gas chromatography.
8. Which substance is NOT normally used as a diluent of heroin? a. Procaine b. Starch c. Glucose d. Quinine
c. Glucose
37. The specificity of microcrystalline tests is _____ the specificity of color tests. a. Less than b. The same as c. Greater than d. None of the above
c. Greater than
During the period of absorption, the concentration of alcohol in arterial blood is _____ the concentration of alcohol in venous blood. a. The same as b. Less than c. Greater than d. None of the above
c. Greater than
Generally, the parallel refractive index of a fiber is _____ the perpendicular refractive index of the same fiber. a. The same as b. Less than c. Greater than d. none of the above
c. Greater than
The density of liquids is ________ the density of gases. a. Less than b. The same as c. Greater than d. None of the above
c. Greater than
The freezing point of water in Fahrenheit is _____ the freezing point of water. a. Less than b. The same as c. Greater than d. None of the above
c. Greater than
The number of hair scales pointing towards the tip of the hair is _____ the number of hair scales pointing towards the hair follicle. a. The same as b. Less than c. Greater than d. None of the above
c. Greater than
The presence of sheath cells on hair that has been pulled quickly from the head is _____ the presence of sheath cells on hairs that have been removed slowly from the scalp. a. The same as b. Less than c. Greater than d. None of the above
c. Greater than
Some breath-testing devices for alcohol use _____ light to measure the quantity of alcohol trapped in a chamber. a. Visible b. Ultraviolet c. Infrared d. Colored
c. Infrared
The attraction between the molecules of a gas is _____ the attraction between the molecules of a liquid. a. The same as b. Greater than c. Less than d. Unrelated to
c. Less than
The use of the Celsius temperature scale by scientists is _____ their use of the Fahrenheit temperature scale. a. Greater than b. The same as c. Less than d. None of the above
c. Less than
11. Which drug is often incorrectly classified as a narcotic? a. Heroin b. Morphine c. Marijuana d. Codeine
c. Marijuana
Which step in the examination of fibers would logically be taken first? a. Examination of dye composition using visible light microspectrophotometer b. Make a cross sectional view of the fibers c. Microscopic examination for color and diameter of fibers d. Infrared spectrophotometry
c. Microscopic examination for color and diameter of fibers
Which race is most likely to have head hair with continuous medullae? a. Negroid b. Caucasian c. Mongoloid d. Native American
c. Mongoloid
17. Which hallucinogen can be synthesized by a simple chemical process and is often manufactured in clandestine laboratories? a. Marijuana b. Mescaline c. PCP d. LSD
c. PCP
20. Which barbiturate is absorbed more slowly than the others? a. Phenobarbital b. Secobarbital c. Pentobarbital d. Amobarbital
c. Pentobarbital
Field sobriety tests do NOT include: a. Walk and turn. b. Horizontal gaze nystagmus. c. Performance of sit ups. d. One leg stand
c. Performance of sit ups.
The two most important physical properties of glass for forensic comparisons are: a. Color and density b. Weight and density c. Refractive index and density d. Refractive index and weight
c. Refractive index and density
Which is made of natural polymers? a. Plastic b. Nylon c. Starch d. Paint
c. Starch
24. Methamphetamine is a: a. Depressant. b. Hallucinogen. c. Stimulant. d. Tranquilizer.
c. Stimulant.
Which would involve determining the refractive index of the fibers? a. Microscopic examination for color and diameter of fibers b. Infrared spectrophotometry c. Study of the birefringence of the fibers d. TLC study of dyes in fibers
c. Study of the birefringence of the fibers
Which of the following is not an exmaple of a natural polymer? a. Starch b. Cellulose c. Sugar d. Proteins
c. Sugar
In what stage can a hair most readily be removed from the scalp? a. Anagenic b. Catagenic c. Telogenic d. Analgesic
c. Telogenic
Alcohol is oxidized in the body primarily in: a. The stomach. b. The small intestine. c. The liver. d. The lungs.
c. The liver.
Tempered glass is used in: a. Windshields in autos manufactured in the United States. b. Crystal stemware. c. The side and rear windows of autos manufactured in the United States. d. Both b and c
c. the side and rear windows of autos manufactured in the United States.
Which is NOT an intensive property of matter? a. Density b. Refractive index c. Weight d. Temperature
c. weight
60. The most satisfactory way of simultaneously separating and tentatively identifying drugs is by: a. Ultraviolet spectrophotometry b. Infrared spectrophotometry c. Emission spectroscopy d. Chromatography
d. Chromatography
The DOT set the maximum allowable blood alcohol concentration for commercial truck and bus drivers at: a. 0.08%. b. 0.02%. c. 0.05%. d. 0.04%.
d. 0.04%.
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. 1:10. b. 1:1,000. c. 1:100. d. 1:2,000.
d. 1:2,000.
Eight inches is approximately _____ centimeters. a. 17 b. 10 c. 8 d. 20
d. 20
A neutral substance will have a pH closest to: a. 0 b. 2 c. 5 d. 7
d. 7
A human head hair is best characterized by: a. The absence of a cortex. b. Its scale pattern. c. A medulla that is more than 1/2 the overall diameter of the hair shaft. d. A medulla that is absent or is less than 1/3 the overall diameter of the hair shaft.
d. A medulla that is absent or is less than 1/3 the overall diameter of the hair shaft.
If a hair does not have a follicular tag, an expert witness is on best scientific footing when stating that: a. The hair in question comes from a 21-year-old. b. His examination reveals that the hair is that of a male. c. The given hair comes from a specific person. d. A suspect hair comes from a particular animal species.
d. A suspect hair comes from a particular animal species.
38. Which type of test would logically be used first by the drug analyst? a. Gas chromatography b. Microcrystalline c. TLC d. Color
d. Color
A drug recognition expert (DRE) can: a. Identify street drugs by their appearance. b. Help a drug user acknowledge his/her habit and suggest ways to become drug-free. c. Determine whether a person has taken one or more drugs. d. Advise the toxicologist as to which drug may be impairing an individual.
d. Advise the toxicologist as to which drug may be impairing an individual.
14. Marijuana has potential use in which medical application? a. Lessening of nausea caused by anticancer drugs b. Useful as a muscle relaxant c. Reduction of excessive eye pressure in glaucoma d. All of the above
d. All of the above
21. Barbiturates act to: a. Produce sleep. b. Create a feeling of well-being. c. Promote relaxation. d. All of the above
d. All of the above
23. 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
28. What is true about the "club drug" Rohypnol? a. It is enhanced when combined with alcohol. b. It results in loss of memory of what happened in the hours after ingestion. c. It is odorless, colorless, and tasteless. d. All of the above
d. All of the above
31. The Controlled Substance Act established five schedules of classification for substances based on the drugs: a. Medical value. b. Potential for physical dependence. c. Potential for psychological dependence. d. All of the above
d. All of the above
4. Which physical symptom is part of the abstinence syndrome? a. Body chills b. Stomach cramps and vomiting c. Convulsions d. All of the above
d. All of the above
52. Which of the following is considered to be a hallucinogen? a. Phencyclidine (PCP) b. Mescaline c. Psilocybin d. All of the above
d. All of the above
54. Which of the following are considered to be "club drugs"? a. Ketamine b. MDMA c. Rohypnol d. All of the above
d. All of the above
6. Most narcotics are: a. Physically addicting. b. Obtained from opium. c. Depressants to the central nervous system. d. All of the above
d. All of the above
Alcohol is eliminated from the body chemically unchanged in: a. Urine b. Breath c. Perspiration d. All of the above
d. All of the above
50. Which of the following is not a depressant? a. Librium b. Valium c. Methaqualone d. All of the above are depressants
d. All of the above are depressants
Which is NOT a factor in determining the rate at which alcohol is absorbed into the bloodstream? a. The alcoholic content of the beverage b. The presence or absence of food in the stomach c. The amount consumed d. All of the above are factors
d. All of the above are factors
Which is NOT a synthetic fiber? a. Rayon b. Polyester c. Acrylic d. All of the above are synthetic
d. All of the above are synthetic
45.There is a significant likelihood that continued use of _____ will result in a high degree of psychological dependence. a. Cocaine b. Heroin c. Marijuana 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. Weeks. c. Years. d. All of the above.
d. All of the above.
Medullae may be classified as being: a. Interrupted or absent. b. Fragmented. c. Continuous. d. All of the above.
d. All of the above.
The refractive index of a substance varies with: a. Its temperature. b. The wavelength of the light passing through it. c. The color of the light passing through it. d. All of the above
d. All of the above.
The visible light microspectrophotometer is a convenient tool with which to compare the color of fibers because: a. Very small samples can be compared b. Fibers can be studied right on a microscope slide c. Fibers are not destroyed d. All of the above.
d. All of the above.
Which of the following properties should be examined when comparing two fibers? a. Color b. Diameter c. Birefringence d. All of the above.
d. All of the above.
Nuclear DNA typing can be most successfully accomplished on hairs that have been removed during which stage of growth? a. Telogenic b. Mutagenic c. Catagenic d. Anagenic
d. Anagenic
The stages of hair growth include all of the following except: a. Anagenic. b. Catagenic. c. Telogenic. d. Analgesic
d. Analgesic
Which of the following is false? a. The basic building blocks of all substances are elements. b. Elements are composed of atoms. c. Two or more elements combine to form compounds. d. At present, 96 compounds have been identified.
d. At present, 96 compounds have been identified
A substance with a pH of 8 is likely to be: a. Water b. Neutral c. Acidic d. Basic
d. Basic
Synthetic fibers display _____ because they are crystalline. a. High density b. Infrared reflectance c. Dispersive properties d. Birefringence
d. Birefringence
A cast of a hair surface can be made using: a. An SEM. b. Clear nail polish. c. Softened vinyl. d. Both B and C
d. Both B and C
The periodic table is a: a. Forensic text table of contents. b. Forensic newsletter issued periodically. c. Special laboratory surface for multiphase experiments. d. Chart listing all the known elements by name and symbol.
d. Chart listing all the known elements by name and symbol
58. "Designer" drugs are: a. High-end products of the major pharmaceutical companies. b. Often abused by the wealthy. c. Very often used in the fashion industry. d. Chemically related to controlled substances.
d. Chemically related to controlled substances.
Carbon monoxide is toxic because it: a. Activates killer white blood cells. b. Destroys red blood cells. c. Causes platelets to clump. d. Combines with hemoglobin to form carboxyhemoglobin.
d. Combines with hemoglobin to form carboxyhemoglobin.
By far the most prevalent plant fiber is: a. Linen. b. Silk. c. Kapok. d. Cotton.
d. Cotton.
Crystalline solids, with the exception of _____ crystals, exhibit _____, or the property of refracting a beam of light into two different ray components. a. Amorphous, refraction b. Calcite, refractive index c. Glass, optical properties d. Cubic, double refraction
d. Cubic, double refraction
Which part of the hair shaft is most resistant to chemical decomposition? a. Cortex b. Medulla c. Follicle d. Cuticle
d. Cuticle
The layers of the hair shaft are the _____, the _____, and the _____. a. Cuticle; root; medulla b. Cortex; mitochondria; pigment c. Pigment; cortex; pigment d. Cuticle; cortex; medulla
d. Cuticle; cortex; medulla
16. Which is NOT an effect of marijuana use? a. Dryness of the mouth b. Increased heart rate c. Reddening of the eyes d. Decrease in appetite for sweets
d. Decrease in appetite for sweets
47. Which of the following is not a stimulant? a. Caffeine b. Amphetamine c. Cocaine d. Ethyl alcohol
d. Ethyl alcohol
46. Regular use of the following drug may lead to physical dependency: a. LSD. b. Marijuana. c. Aspirin. d. Ethyl alcohol.
d. Ethyl alcohol.
Which of the following is not a layer of the hair shaft? a. Cuticle b. Cortex c. Medulla d. Follicle
d. Follicle
To analyze blood for alcohol, forensic labs normally use: a. TLC. b. GM/MS. c. LC. d. GC.
d. GC.
In forensic toxicology, all positive drug findings must be confirmed by a specific chemical test. The confirmation test of choice is: a. Ultraviolet spectrophotometry. b. Gas chromatography. c. Infrared spectrophotometry. d. Gas chromatography-mass spectrometry.
d. Gas chromatography-mass spectrometry.
43. Marijuana is considered to be a: a. Depressant. b. Stimulant. c. Narcotic. d. Hallucinogen.
d. Hallucinogen.
53. 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
61. Which of the following analytical technique is considered to be a specific test in a drug identification scheme? a. Color test b. Microcrystalline test c. Thin-layer chromatography d. Infrared spectrophotometry
d. Infrared spectrophotometry
Which would produce "fingerprints" of the fibers? a. Examination of dye composition using visible light microspectrophotometer b. Make a cross sectional view of the fibers c. Microscopic examination for color and diameter of fibers d. Infrared spectrophotometry
d. Infrared spectrophotometry
64. TLC uses _____ as its moving phase. a. A carrier gas b. Silica gel c. A thin film d. Liquid
d. Liquid
13. What is the most potent form of marijuana? a. Hashish b. Loose vegetation c. Sinsemilla d. Liquid hashish
d. Liquid hashish
51. Which of the following statements is false? a. Hashish is a concentrated preparation of marijuana. b. The active ingredient of marijuana is tetrahydrocannabinol. c. Prior to 1970 marijuana was classified as a narcotic drug. d. Marijuana is synthesized from the Cannabis sinsemilla plant.
d. Marijuana is synthesized from the Cannabis sinsemilla plant.
Which of the following properties should not be examined when comparing two synthetic fibers? a. Presence or absence of delustering particles b. Diameter c. Lengthwise striations d. Medullary index
d. Medullary index
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. Frye standard. d. Missouri v. McNeely.
d. Missouri v. McNeely.
In the case of Schmerber v. California, blood was categorized as being: a. Direct evidence. b. Indirect evidence. c. Testimonial evidence. d. Nontestimonial evidence.
d. Nontestimonial evidence.
63. Which chromatographic process would be LEAST likely to be utilized in the crime lab? a. GC b. TLC c. HPLC d. Paper chromatography
d. Paper chromatography
Microscopic hair comparisons must be regarded by police and courts as: a. Conclusive b. Individualizing c. Useless d. Presumptive
d. Presumptive
A breath test reflects the alcohol concentration in the: a. Aorta. b. Left ventricle. c. Pulmonary vein. d. Pulmonary artery.
d. Pulmonary artery.
Which was the first man-made fiber? a. Nylon b. Polyester c. Acetate d. Rayon
d. Rayon
Rayon is classified as a: a. Natural fiber. b. Synthetic fiber. c. Plant fiber. d. Regenerated fiber.
d. Regenerated fiber.
59. A compound can tentatively be identified by gas chromatography from its: a. Carrier gas. b. Rf value. c. Partition coefficient. d. Retention time.
d. Retention time.
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.
22. Which is true of the use of mild tranquilizers? a. They impair high-thinking faculties. b. They induce sleep. c. They do not produce dependency. d. They reduce tension.
d. They reduce tension.
Which statement is true? a. The racial origin of hair can always be identified. b. Hair can be individualized through its trace elemental composition. c. Hair is routinely examined to determine sex. d. Two hairs from the same head may not have the same morphological characteristics.
d. Two hairs from the same head may not have the same morphological characteristics.
About 95-98 percent of alcohol is oxidized to what two substances? a. Carbon dioxide and dehydrogenase b. Water and acetic acid c. Acetaldehyde and acetic acid d. Water and carbon dioxide
d. Water and carbon dioxide
To explain the events that occur after radiation is absorbed by a substance, light must be characterized as: a. A wave of constant frequency. b. A wave of variable frequency. c. A wave consisting of non-discrete particles. d. A stream of discrete particles.
d. a stream of discrete particles
The smallest particle of an element that can exist and still retain its identity as that element is the: a. Compound. b. Element. c. Photon. d. Atom.
d. atom
The process of a glass prism separating sunlight into component colors is called: a. Refraction b. Birefringence c. Sublimation d. Dispersion
d. dispersion
A(n) _____ property describes the behavior of a substance without reference to any other substance while a(n) _____ property describes the behavior of a substance when it reacts or combines with another substance. a. Optical; birefringent b. Physical; biological c. Chemical; biological d. Physical; chemical
d. physical; chemical
The photons of which source have the LEAST amount of energy? a. Microwaves b. Gamma rays c. Infrared rays d. Radio waves
d. radio waves
Sublimation is defined as a change of state from: a. Gas to liquid. b. Liquid to solid. c. Solid to liquid. d. Solid to gas.
d. solid to gas
Which of the following has higher frequencies and higher energy values in the electromagnetic spectrum? a. Visible light b. Radio waves c. Ultraviolet radiation d. X-rays
d. x-rays