Question 1

Use the figures to answer the question.

Which molecule shown contains a carboxyl group?

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 2

A carbon atom has 6 electrons however, its valency is 4. This is because the carbon atom ________.

Accepted Answer

A)   donates its 2 electrons to another atom
B)   shares its 2 electrons and bonds with another atom
C)   has 4 electrons in its first shell and 2 in the second shell
D)   has only 2 electrons in its first shell and 4 in the second shell

Question 3

A carbon atom is most likely to form what kind of bond(s)  with other atoms?

Accepted Answer

A)   ionic
B)   hydrogen
C)   covalent
D)   ionic bonds, covalent bonds, and hydrogen bonds

Question 4

Which of the functional groups is not reactive but serves as a recognizable tag on the DNA molecule and alter the expression of genes in the cells.

Accepted Answer

A)   amino
B)   methyl
C)   carboxyl
D)   hydroxyl

Question 5

Use the figure to answer the question.

Thalidomide and L-dopa (see figure)  are examples of pharmaceutical drugs that occur as enantiomers, or molecules that ________.

Accepted Answer

A)   have identical three-dimensional shapes
B)   are mirror images of one another
C)   are mirror images of one another and have the same biological activity
D)   are cis-trans isomers

Question 6

The experimental approach taken in current biological investigations presumes that ________.

Accepted Answer

A)   simple organic compounds can be synthesized in the laboratory from inorganic precursors, but complex organic compounds like carbohydrates and proteins can be synthesized only by living organisms
B)   a life force ultimately controls the activities of living organisms, and this life force cannot be studied by physical or chemical methods
C)   living organisms are composed of the same elements present in nonliving things, plus a few special trace elements found only in living organisms or their products
D)   living organisms can be understood in terms of the same physical and chemical laws that can be used to explain all natural phenomena

Question 7

Use the figures to answer the question.

Which molecules shown contain a carbonyl group?

Accepted Answer

A)   A and B
B)   B and C
C)   B, C, and D
D)   C and D

Question 8

The complexity and variety of organic molecules is due to ________.

Accepted Answer

A)   the chemical versatility of carbon atoms
B)   the variety of rare elements in organic molecules
C)   the diverse bonding patterns of nitrogen
D)   their interaction with water

Question 9

Stanley Miller's 1953 experiments supported the hypothesis that ________.

Accepted Answer

A)   life on Earth arose from simple inorganic molecules
B)   organic molecules can be synthesized abiotically under conditions that may have existed on early Earth
C)   life on Earth arose from simple organic molecules, with energy from lightning and volcanoes
D)   the conditions on early Earth were conducive to the origin of life

Question 10

Why is carbon so important in biology?

Accepted Answer

A)   It is a common element on Earth.
B)   It has very little electronegativity, making it a good electron donor.
C)   It bonds to only a few other elements.
D)   It can form a variety of carbon skeletons and host functional groups.

Question 11

Organic molecules with only hydrogens and five carbon atoms cannot ________.

Accepted Answer

A)   have a branching carbon skeleton
B)   have different combinations of double bonds between carbon atoms
C)   have different positions of double bonds between carbon atoms
D)   form enantiomers

Question 12

Which of the following molecules is polar?
C₃H₇OHC₂H₅COOH

Accepted Answer

A)   C₃H₇OH and C₂H₅COOH are both polar molecules.
B)   Neither C₂H₅COOH or C₃H₇OH is polar.
C)   C₂H₅COOH is polar, but C₃H₇OH is not polar.
D)   C₂H₅COOH is not polar, but C₃H₇OH is polar.

Question 13

Use the following figure to answer the question.

The two molecules shown in the figure are best described as ________.

Accepted Answer

A)   enantiomers
B)   radioactive isotopes
C)   structural isomers
D)   cis-trans isomers

Question 14

Use the following figure to answer the question.

The figure shows the structures of glucose and fructose. These two molecules are ________.

Accepted Answer

A)   isotopes
B)   enantiomers
C)   cis-trans isomers
D)   structural isomers

Question 15

Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of a large variety of organic compounds. Miller did not use ________ as one of the gases in his experiment.

Accepted Answer

A)   methane
B)   oxygen
C)   water
D)   ammonia

Question 16

Organic chemistry is currently defined as

Accepted Answer

A)   the study of compounds made only by living cells.
B)   the study of carbon compounds.
C)   the study of natural (as opposed to synthetic)  compounds.
D)   the study of hydrocarbons.

Question 17

Use the figures to answer the question.
A.  −OH -\mathrm{OH} −OH 
C.  −NH2 -\mathrm{NH}_{2} −NH2​ 
B. 
D.  −SH -\mathrm{SH} −SH 
Which of the functional groups shown is present in ethanol but not in ethane?

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 18

Some carbon skeletons have different numbers and locations of double bonds to ________.

Accepted Answer

A)   add molecular complexity and diversity that characterize living matter
B)   be more flexible that makes the molecule stronger
C)   stay in its liquid state
D)   increase its solubility in water

Question 19

Use the figures to answer the question.

Which molecule shown above contains a functional group that is a part of the molecule known as the "energy currency of living organisms"?

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 20

Use the figure to answer the question.

What is the name of the functional group shown in the figure?

Accepted Answer

A)   carbonyl
B)   ketone
C)   aldehyde
D)   carboxyl

Exam 4: Carbon and the Molecular Diversity of Life

The experimental approach taken in current biological investigations presumes that ________.

Correct Answer
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Correct Answer
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Use the figure to answer the question. What is the name of the functional group shown in the figure?

Correct Answer
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Use the figures to answer the question. Which molecule shown contains a carboxyl group?

Correct Answer
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Why is carbon so important in biology?

Correct Answer
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Use the figures to answer the question. Which molecules shown contain a carbonyl group?

Correct Answer
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Use the figure to answer the question. Thalidomide and L-dopa (see figure) are examples of pharmaceutical drugs that occur as enantiomers, or molecules that ________.

Correct Answer
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Which of the following molecules is polar? C₃H₇OHC₂H₅COOH

Correct Answer
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Organic chemistry is currently defined as

Correct Answer
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Use the following figure to answer the question. The two molecules shown in the figure are best described as ________.

Correct Answer
verified

Use the figures to answer the question. Which molecule shown above contains a functional group that is a part of the molecule known as the "energy currency of living organisms"?

Correct Answer
verified

Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of a large variety of organic compounds. Miller did not use ________ as one of the gases in his experiment.

Correct Answer
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A carbon atom is most likely to form what kind of bond(s) with other atoms?

Correct Answer
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Use the following figure to answer the question. The figure shows the structures of glucose and fructose. These two molecules are ________.

Correct Answer
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Which of the functional groups is not reactive but serves as a recognizable tag on the DNA molecule and alter the expression of genes in the cells.

Correct Answer
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The complexity and variety of organic molecules is due to ________.

Correct Answer
verified

Some carbon skeletons have different numbers and locations of double bonds to ________.

Correct Answer
verified

Stanley Miller's 1953 experiments supported the hypothesis that ________.

Correct Answer
verified

A carbon atom has 6 electrons however, its valency is 4. This is because the carbon atom ________.

Correct Answer
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Organic molecules with only hydrogens and five carbon atoms cannot ________.

Correct Answer
verified

Exam 4: Carbon and the Molecular Diversity of Life

The experimental approach taken in current biological investigations presumes that ________.

Correct AnswerverifiedShow Answer

Use the figures to answer the question. A. −OH -\mathrm{OH} −OH C. −NH2 -\mathrm{NH}_{2} −NH2​ B. D. −SH -\mathrm{SH} −SH Which of the functional groups shown is present in ethanol but not in ethane?

Correct AnswerverifiedShow Answer

Use the figure to answer the question. What is the name of the functional group shown in the figure?

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule shown contains a carboxyl group?

Correct AnswerverifiedShow Answer

Why is carbon so important in biology?

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecules shown contain a carbonyl group?

Correct AnswerverifiedShow Answer

Use the figure to answer the question. Thalidomide and L-dopa (see figure) are examples of pharmaceutical drugs that occur as enantiomers, or molecules that ________.

Correct AnswerverifiedShow Answer

Which of the following molecules is polar? C₃H₇OHC₂H₅COOH

Correct AnswerverifiedShow Answer

Organic chemistry is currently defined as

Correct AnswerverifiedShow Answer

Use the following figure to answer the question. The two molecules shown in the figure are best described as ________.

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule shown above contains a functional group that is a part of the molecule known as the "energy currency of living organisms"?

Correct AnswerverifiedShow Answer

Miller's classic experiment demonstrated that a discharge of sparks through a mixture of gases could result in the formation of a large variety of organic compounds. Miller did not use ________ as one of the gases in his experiment.

Correct AnswerverifiedShow Answer

A carbon atom is most likely to form what kind of bond(s) with other atoms?

Correct AnswerverifiedShow Answer

Use the following figure to answer the question. The figure shows the structures of glucose and fructose. These two molecules are ________.

Correct AnswerverifiedShow Answer

Which of the functional groups is not reactive but serves as a recognizable tag on the DNA molecule and alter the expression of genes in the cells.

Correct AnswerverifiedShow Answer

The complexity and variety of organic molecules is due to ________.

Correct AnswerverifiedShow Answer

Some carbon skeletons have different numbers and locations of double bonds to ________.

Correct AnswerverifiedShow Answer

Stanley Miller's 1953 experiments supported the hypothesis that ________.

Correct AnswerverifiedShow Answer

A carbon atom has 6 electrons however, its valency is 4. This is because the carbon atom ________.

Correct AnswerverifiedShow Answer

Organic molecules with only hydrogens and five carbon atoms cannot ________.

Correct AnswerverifiedShow Answer

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