Question 1

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 helps stabilize proteins by forming covalent cross-links within or between protein molecules?

Accepted Answer

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

Question 2

A compound contains hydroxyl groups as its predominant functional group. Therefore, this compound ________.

Accepted Answer

A)   lacks an asymmetric carbon and is probably a fat or lipid
B)   should dissolve in water
C)   should dissolve in a nonpolar solvent
D)   will not form hydrogen bonds with water

Question 3

Use the figures to answer the question.

Which molecule shown above can contribute negative charge when positioned in a chain?

Accepted Answer

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

Question 4

Why are hydrocarbons insoluble in water?

Accepted Answer

A)   The majority of their bonds are polar covalent carbon-to-hydrogen linkages.
B)   The majority of their bonds are nonpolar covalent carbon-to-hydrogen linkages.
C)   They exhibit considerable molecular complexity and diversity.
D)   They are less dense than water.

Question 5

How many electrons does one atom of carbon share to complete its valence shell?

Accepted Answer

A)   2
B)   3
C)   4
D)   8

Question 6

Which two functional groups are always found in amino acids?

Accepted Answer

A)   carbonyl and amino groups
B)   carboxyl and amino groups
C)   amino and sulfhydryl groups
D)   hydroxyl and carboxyl groups

Question 7

Choose the term that correctly describes the relationship between these two sugar molecules:

Accepted Answer

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

Question 8

Use the figures to answer the question.

Which molecule can be a result of mercaptoethanol reduction of a disulfide bridge?

Accepted Answer

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

Question 9

In an ethane (C₂H₆)  molecule, each carbon atom is bonded to ________ hydrogen atoms.

Accepted Answer

A)   two
B)   three
C)   four
D)   six

Question 10

Use the figures to answer the question.

Which molecule has at least one carbon atom attached to three different chemical groups?

Accepted Answer

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

Question 11

Which action could produce a carbonyl group?

Accepted Answer

A)   the replacement of the -OH of a carboxyl group with hydrogen
B)   the addition of a thiol to a hydroxyl
C)   the addition of a hydroxyl to a phosphate
D)   the replacement of the nitrogen of an amine with oxygen

Question 12

Amino acids are acids because they always possess ________ as the functional group?

Accepted Answer

A)   amino
B)   carbonyl
C)   carboxyl
D)   phosphate

Question 13

Each bond in carbon dioxide represents ________.
 O=C=O \mathrm{O}=\mathrm{C}=\mathrm{O} O=C=O

Accepted Answer

A)   one resonating electron
B)   a pair of shared electrons
C)   two pairs of shared electrons
D)   a pair of protons

Question 14

Which of the following is true of carbon?

Accepted Answer

A)   It forms only polar molecules.
B)   It can form a maximum of three covalent bonds with other elements.
C)   It is highly electronegative.
D)   It can form both polar and nonpolar bonds.

Question 15

Use the figures to answer the question.

Which molecule shown is a thiol?

Accepted Answer

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

Question 16

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

Accepted Answer

A)   hydroxyl
B)   carbonyl
C)   amino
D)   phosphate

Question 17

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that ________.

Accepted Answer

A)   have identical chemical formulas but differ in the branching of their carbon skeletons
B)   are mirror images of each other
C)   differ in the location of their double bonds
D)   differ in the arrangement of atoms around their double bonds

Question 18

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 functional group shown can pick up protons and raise the pH of the surrounding solution?

Accepted Answer

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

Exam 4: Carbon and the Molecular Diversity of Life

In an ethane (C₂H₆) molecule, each carbon atom is bonded to ________ hydrogen atoms.

Correct Answer
verified

Use the figures to answer the question. Which molecule has at least one carbon atom attached to three different chemical groups?

Correct Answer
verified

A compound contains hydroxyl groups as its predominant functional group. Therefore, this compound ________.

Correct Answer
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Choose the term that correctly describes the relationship between these two sugar molecules:

Correct Answer
verified

Use the figures to answer the question. Which molecule shown is a thiol?

Correct Answer
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Amino acids are acids because they always possess ________ as the functional group?

Correct Answer
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Which two functional groups are always found in amino acids?

Correct Answer
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Correct Answer
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Use the figures to answer the question. Which molecule can be a result of mercaptoethanol reduction of a disulfide bridge?

Correct Answer
verified

Which action could produce a carbonyl group?

Correct Answer
verified

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules that ________.

Correct Answer
verified

Correct Answer
verified

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

Correct Answer
verified

Each bond in carbon dioxide represents ________. $\mathrm{O}=\mathrm{C}=\mathrm{O}$

Correct Answer
verified

Use the figures to answer the question. Which molecule shown above can contribute negative charge when positioned in a chain?

Correct Answer
verified

Why are hydrocarbons insoluble in water?

Correct Answer
verified

Which of the following is true of carbon?

Correct Answer
verified

How many electrons does one atom of carbon share to complete its valence shell?

Correct Answer
verified

Exam 4: Carbon and the Molecular Diversity of Life

In an ethane (C₂H₆) molecule, each carbon atom is bonded to ________ hydrogen atoms.

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule has at least one carbon atom attached to three different chemical groups?

Correct AnswerverifiedShow Answer

A compound contains hydroxyl groups as its predominant functional group. Therefore, this compound ________.

Correct AnswerverifiedShow Answer

Choose the term that correctly describes the relationship between these two sugar molecules:

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule shown is a thiol?

Correct AnswerverifiedShow Answer

Amino acids are acids because they always possess ________ as the functional group?

Correct AnswerverifiedShow Answer

Which two functional groups are always found in amino acids?

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 functional group shown can pick up protons and raise the pH of the surrounding solution?

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule can be a result of mercaptoethanol reduction of a disulfide bridge?

Correct AnswerverifiedShow Answer

Which action could produce a carbonyl group?

Correct AnswerverifiedShow Answer

Research indicates that ibuprofen, a drug used to relieve inflammation and pain, is a mixture of two enantiomers; that is, molecules 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 helps stabilize proteins by forming covalent cross-links within or between protein molecules?

Correct AnswerverifiedShow Answer

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

Correct AnswerverifiedShow Answer

Each bond in carbon dioxide represents ________. O=C=O \mathrm{O}=\mathrm{C}=\mathrm{O} O=C=O

Correct AnswerverifiedShow Answer

Use the figures to answer the question. Which molecule shown above can contribute negative charge when positioned in a chain?

Correct AnswerverifiedShow Answer

Why are hydrocarbons insoluble in water?

Correct AnswerverifiedShow Answer

Which of the following is true of carbon?

Correct AnswerverifiedShow Answer

How many electrons does one atom of carbon share to complete its valence shell?

Correct AnswerverifiedShow Answer

Correct Answer
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Each bond in carbon dioxide represents ________. $\mathrm{O}=\mathrm{C}=\mathrm{O}$

Correct Answer
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Correct Answer
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