Study.com Biology

ionic

A bond is formed between a sodium atom and a chlorine atom when the sodium atom gives an electron to the chlorine atom. Identify the type of bond formed between sodium and chlorine. a. Covalent b. Ionic c. Polar covalent d. Metallic

One

A controlled experiment tests how many variables at one time? a. One b. Three c. Two d. Four e. None

polymer

A long chain molecule formed by many smaller units is called a a. polymer b. dimer c. trimer d. monomer

Experiment

A scientist is running a test of her hypothesis. Which step of the scientific method is she executing? a. Conclusion b. Experiment c. Observation d. Analysis

Tri

A single sugar is called a 'monosaccharide.' '_____saccharide' refers to a three sugar polymer. a. Penta b. Hexa c. Tri d. Di

dimer

A two unit molecule is a a. dimer b. none of these answers c. monomer d. trimer

All of the answers are correct.

All amino acids contain which of the following? a. None of the answers are correct. b. An amino group c. All of the answers are correct. d. A central carbon e. A carboxyl group

all lipids are fats

All of the following statements are true about lipids, EXCEPT that _____. a. lipids are good at storing energy b. steroid hormones like testosterone are lipids c. lipids are biological molecules that are insoluble in d. water d. all lipids are fats

sugars are found only in plants

All of the following statements are true, EXCEPT _____. a. starch is composed of amylopectin and amylose b. mammals store carbohydrates in the form of glycogen c. sugars are found only in plants d. pasta and cereals are good sources of carbohydrates

All of the answers are correct.

Amino acids are the building blocks of which of the following? a. Proteins b. Amino groups c. Nucleic acids d. None of the answers are correct. e. DNA

A nitrogen and two hydrogen atoms

An amino group consists of a. A carbon and two hydrogen atoms b. A carbon and two nitrogen atoms c. An oxygen and two hydrogen atoms d. A nitrogen and two hydrogen atoms e. A nitrogen and one carbon atom

protons

An element is defined by the number of: Chemical bonds a. Electrons b. Ions c. Neutrons d. protons

supported or not supported

An experiment should show that a hypothesis is either _____. a. correct or incorrect b. supported or not supported c. right or wrong d. peer reviewed or not reviewed

92%

Approximately what percentage of the blood is water? a. 60% b. 0% c. 92% d. 34%

Question

At what step in the scientific method does a scientist propose the problem that he or she wants to solve? a. Analysis b. Question c. Hypothesis d. Experiment

Glucose

Carlos just finished an exhausting workout. Which of the following carbohydrates can be readily used by his body as a source of fuel? a. Any kind of polysaccharide. b. Glucose c. Dietary fiber d. Cellulose

natural polymers

Cellulose & proteins are types of a. man-made polymers b. monomers c. dimers d. natural polymers

Strontium

Given the following information, which element(s) are most likely to lose electrons? I. Iodine is a member of Group VII (halides). II. Strontium is located in the second column of the periodic table. III. Selenium has six valence electrons.

8

If Argon is a noble gas and its atomic number is 18, how many electrons can be found in the valence level? a. 6 b. 8 c. 36 d. 18

an element

If only one type of atom makes up a substance, what can you call this substance? a. a neutron b. a proton c. a compound d. an element

Repeat

In order for a scientist's work to be accepted, other scientists must be able to _____ the experiment. a. disprove b. refute c. repeat d. analyze e. observe

disaccharide

Lactose is composed of a glucose molecule and a galactose molecule, therefore, lactose is classified as a _____. a. disaccharide b. trisaccharide c. polysaccharide d. monosaccharide

Fat

Lawrence wants to eat a food that is high in energy before she starts training for her tennis competition. Which of the following types of food will give her the most energy per pound? a. Sugar b. Protein c. Carbohydrates d. Fat

Protons and neutrons

Particles that are found in the atomic nucleus are: a. Protons, neutrons and electrons b. Protons and neutrons c. Neutrons and electrons d. Protons and electrons

amino acids

Proteins are biological molecules made of _____. a. amino acids b. glycerol c. sugars d. nucleotides

Structural proteins

Proteins in our skin, hair, and nails are called what? a. Regulatory proteins b. Storage proteins c. Transport proteins d. Structural proteins

hydroxyl

The _____ has an oxygen atom single-bonded to hydrogen and single-bonded to a carbon-containing group. a. hydroxyl b. amine c. ether d. carbonyl e. ester

R-group

The group that is unique in each of the 20 amino acids is a. None of the answers are correct. b. R-group c. All of the answers are correct. d. Amino group e. Carboxyl group

Organisms that produce their own food.

What are autotrophs? a. Organisms that produce their own food. b. All other organisms besides plants and some algae. c. All other organisms besides humans and some animals. d. Organisms that consume other organisms.

Carbonyl carbon and amino group nitrogen

What atoms are connected by a peptide bond? a. Amine nitrogen and another amine nitrogen b. Carbonyl carbon and carbonyl oxygen c. Side chain groups d. Carbonyl carbon and amino group nitrogen

Two hydrogen, one oxygen

What atoms make up a water molecule? a. Two oxygen, one hydrogen b. Two hydrogen, three oxygen c. One hydrogen, one oxygen d. Two hydrogen, one oxygen

number of protons

What does the atomic number represent? a. number of neutrons b. total number of protons and neutrons c. number of protons d. total number of electrons and protons combined e. total number of electrons, protons, and neutrons

Electrostatic attraction

What force causes a chemical bond to hold atoms together? a. Gravitational attraction b. Electrostatic attraction c. Nuclear forces d. Glue

Intermolecular forces between polymer chains

What holds high density polyethylene together? a. Addition of other atoms to the plastic b. Intermolecular forces between polymer chains c. Carbon-carbon double bonds d. Branching of carbon chains

An organism that consumes dead and decaying material.

What is a detritivore? a. An organism that consumes living producers. b. An organism that consumes other living consumers. c. An organism that consumes dead and decaying material. d. An organism that consumes both living producers and consumers.

The space around the nucleus where the electrons are most likely to be found

What is an electron shell? a. The space around the nucleus where the electrons are most likely to be found b. A hard container holding electrons close to the nucleus c. The exact location of an electron d. The electron's protective outer layer

An 'other feeder'

What is another name for a heterotroph? a. A self-feeder b. An 'other feeder' c. Autotrophs d. A producer

A material containing sets of two or more atoms connected together by chemical bonds

What is the definition of a chemical? a. A material containing only non-metals b. A material containing sets of two or more atoms c. connected together by chemical bonds c. A material containing ionic bonds only d. A material containing sets of two or more molecules connected together by chemical bonds

Ester

What is the functional group that is formed when glycerol reacts with carboxylic acids to form triglycerides? a. Ester b. Ether c. Carbohydrate d. Carboxylic acid

2

What is the maximum number of electrons that can occupy the 2s orbital? a. 8 b. 3 c. 6 d. 2

Root

What is the primary unit of a word called? a. Affix b. Prefix c. Suffix d. Root

Osmosis

What is the process of water moving across a semipermeable membrane? a. Diffusion b. Solubility c. Saturation d. Osmosis

R

What is the shorthand for a carbon-containing substance in organic chemistry? a. P b. R c. O d. C e. Ca

Dehydration

What type of reaction causes the formation of sugar molecules larger than monosaccharides? a. Dehydration b. Deamination c. Decarboxylation d. Hydration

The sugar would come out of solution and crystallize.

What would happen if you added a sugar crystal to a super saturated solution of sugar in water? a. The sugar crystal would dissolve in the solution b. Nothing; no change. c. The sugar would come out of solution and crystallize. d. The sugar crystal would settle on the the bottom of the container the solution was in.

It would shrivel up

What would you expect to happen to a piece of celery you put into a hypertonic solution? a. It would shrivel up b. It would stay the same c. It would crack in half d. It would swell

an enzyme

When a protein makes it easier for a biological reaction to happen, it is acting as _____. a. a transporter b. a messenger c. a structural protein d. an enzyme

X axis

Which axis is the horizontal axis? a. Y axis b. None of these answers are correct c. Z axis d. X axis

Greek and Latin

Which languages contribute to most scientific vocabulary? a. English and German b. French and Spanish c. French and English d. Italian and Greek e. Greek and Latin

All of the answers are correct.

Which of the following are heterotrophs? a. Bacteria b. Carnivorous and parasitic plants c. All of the answers are correct. d. Fungi

Amine

Which of the following functional groups contains nitrogen? a. Amine b. Alcohol c. Carboxylic Acid d. Hydroxyl e. Disulfide

proton

Which of the following has a positive charge and a mass of one amu? a. proton b. electron c. neutron d. element

Polar ionic bond

Which of the following is NOT a type of chemical bond? a. Polar covalent bond b. Ionic bond c. Covalent bond d. Polar ionic bond

Provide energy (sugar)

Which of the following is NOT a use of water in the human body? a. Chemical reactions b. Temperature regulation c. Transport d. Provide energy (sugar)

Theory

Which of the following is NOT one of the six key steps of the scientific method? a. Theory b. Hypothesis c. Observation d. Experiment

Scientists never compete with one another.

Which of the following is NOT true about science? a. Scientists often rely on their experience. b. Scientists never compete with one another. c. Science journals usually require peer review. d. Scientists often use creativity.

Solute molecules will move across semipermeable membranes to equalize concentration on both sides of the membrane

Which of the following is NOT true? a. Diffusion and osmosis are important in biological systems b. Solute molecules will move across semipermeable membranes to equalize concentration on both sides of the membrane c. Molecules will try to move so that there is equilibrium of concentration in all parts of a solution d. You can have more solute in a solution than can be found in a saturated solution of the same components at equilibrium

All of the answers are correct.

Which of the following is a function performed by proteins? a. Muscle contraction b. All of the answers are correct. c. Transportation d. Regulation

Salt dissolving in water without stirring

Which of the following is an example of diffusion? a. Salt dissolving in water without stirring b. Precipitation of a solid from a solution c. Cells exploding in a hypotonic solution d. Sodium moving to an area of higher concentration across a cell membrane

They must be obtained through foods.

Which of the following is true about essential amino acids? a. None of the answers are correct. b. They must be obtained through foods. c. All of the answers are correct. d. They can be synthesized by your body. e. They typically include serine.

They may be carnivores, herbivores, or omnivores.

Which of the following is true about heterotrophs? a. They may be carnivores, herbivores, or omnivores. b. They all eat both consumers and producers. c. They all rely on the same types of food sources. d. They all rely on only one type of food source.

They must contain carbon

Which of the following is true about organic molecules? a. None of the above b. They must contain carbon c. They contain only carbon d. They can only be found in living organisms e. They always have chains of carbon atoms

Law

Which of the following is viewed as scientific fact without any exceptions? a. Theory b. Hypothesis c. Observation d. Law e. Analysis

Generate heat

Which of the following roles do lipids NOT play in our bodies? a. Act as hormones b. Store energy c. Make up part of our cell membranes d. Generate heat

Electrons are considered valence electrons if they are in the outermost electron shell.

Which of the following statements is true? a. Electrons removed from atoms always increase the stability of the atom. b. The energy of electrons decreases with increasing distance from the nucleus. c. Electrons circle the nucleus in predictable orbits like the Earth around the sun. d. Electrons are considered valence electrons if they are in the outermost electron shell.

Theory

Which of the following summarizes an accepted hypothesis tested by many scientists? a. Observation b. Conclusion c. Law d. Theory e. Analysis

Covalent

Which of the following type of bond normally forms between two non-metal atoms? a. Metallic b. Covalent c. Plastic d. Ionic

Peer review

Which of these is a process that requires scientists to critique each other's work and decide whether it meets the standards of the scientific community? a. Question b. Peer review c. Conclusion d. Experiment

Hydroxyl groups and ethers.

Which set of functional groups is always found in sugars? a. Amines and alcohols. b. Ethers and amines. c. Hydroxyl groups and ethers. d. Ethers and carboxylic acids.

pie chart

Which type of chart compares data with relative percentages? a. Line Graph b. Flow Chart c. Pie Chart d. Bar Chart

flow chart

Which type of chart illustrates relationships between concepts or steps in a process? a. Table b. Pie Chart c. Line Graph d. Flow Chart e. Bar Chart

line graph

Which type of chart plots the relationship between dependent and independent variables? a. Pie Chart b. Bar Chart c. Flow Chart d. Line Graph

visual

Which type of learner prefers pictures and charts? a. Verbal b. Analytic c. Visual d. Holistic

Analytic

Which type of learning approach focuses on subdivided parts? a. Visual b. Analytic c. Holistic d. Verbal

independent variable

Which variable remains unaffected by the other variables of an experiment? a. Independent variable b. None of these answers are correct. c. Dependent variable d. Y variable

Suffix

Which word part appears only AFTER the root? a. Prefix b. Affix c. Suffix d. Subject

Because we've come to suspect that water is an important requirement for the development of life

Why are we attempting to find water elsewhere in our solar system? a. Because we want to prove that Earth is unique by showing water doesn't exist anywhere else b. Because we're running out on Earth c. Because we've come to suspect that water is an important requirement for the development of life d. We aren't; the fact that water is vital to life on Earth is just an amazing coincidence

Part of the soap molecule is polar and dissolves in water, while part is non-polar and dissolves in the lipids.

Why does soap remove grease from pans when we wash dishes? a. Part of the soap molecule is polar and dissolves in water, while part is non-polar and dissolves in the lipids. b. Soap sends a chemical message to fats to break up fat blobs in the pan. c. The whole soap molecule is non-polar, so it breaks apart fat blobs. d. Soap molecules react with fats to break up fat blobs.

Because it allows the transport of nutrients to and within cells

Why is water important to human cell life? a. Because it provides energy b. Because it allows the transport of nutrients to and within cells c. Because it allows the transport of nutrients within cells (but not between them) d. Because it gives the cell its shape

Esters

_____ hold fats together in biological systems and bond fatty acids to glycerol. a. Hydroxyls b. Amines c. Esters d. Carbonyls e. Ethers