Question 1

Which chemical group is most likely to be responsible for an organic molecule behaving as a base (see Concept 2.5) ?

Accepted Answer

A)   hydroxyl
B)   carbonyl
C)   amino
D)   phosphateE) C) and D)
F) None of the above

Question 2

Which of the following chemical equations describes a hydrolysis reaction?

Accepted Answer

A)   monosaccharide + monosaccharide disaccharide + H₂O
B)   monosaccharide + monosaccharide + H₂O disaccharide
C)   disaccharide monosaccharide + monosaccharide + H₂O
D)   disaccharide + H₂O monosaccharide + monosaccharideE) A) and D)
F) C) and D)

Question 3

Which of the following hydrocarbons has a double bond in its carbon skeleton?

Accepted Answer

A)   C3H8
B)   C2H6
C)   C2H4
D)   C2H2E) A) and B)
F) A) and C)

Question 4

A chemist wishes to make an organic molecule less acidic. Which of the following functional groups should be added to the molecule in order to do so?

Accepted Answer

A)   carboxyl
B)   sulfhydryl
C)   hydroxyl
D)   amino
E)   phosphateF) B) and E)
G) A) and B)

Question 5

Figure 3.3
-Which of the structures illustrated in Figure 3.3 is an impossible covalently bonded molecule?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) B) and C)
G) C) and D)

Question 6

If cells are grown in a medium containing radioactive 35S, which of these molecules will be radioactively labeled?

Accepted Answer

A)   phospholipids
B)   nucleic acids
C)   proteins
D)   starchE) C) and D)
F) B) and D)

Question 7

A nucleotide is composed of

Accepted Answer

A)   a nitrogenous base and a phosphate group.
B)   a nitrogenous base and a pentose sugar.
C)   a nitrogenous base, a phosphate group, and a pentose sugar.
D)   a nitrogenous base, a phosphate group, a pentose sugar, and an amino acid.E) A) and B)
F) A) and C)

Question 8

Figure 3.12
-At which bond in Figure 3.12 would water need to be added to achieve hydrolysis of the dipeptide, back to its component amino acids?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and D)
G) C) and D)

Question 9

Which of the following is true of both starch and cellulose?

Accepted Answer

A)   They are both polymers of glucose.
B)   They are cis-trans isomers of each other.
C)   They can both be digested by humans.
D)   They are both used for energy storage in plants.
E)   They are both structural components of the plant cell wall.F) A) and D)
G) C) and D)

Question 10

Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?

Accepted Answer

A)   hydrophobic interactions
B)   ionic bonds
C)   hydrogen bonds
D)   peptide bondsE) A) and D)
F) A) and C)

Question 11

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 are hydrophilic.
D)   They exhibit considerable molecular complexity and diversity.E) None of the above
F) A) and B)

Question 12

A carbon atom is most likely to form which of the following bonds with other atoms?

Accepted Answer

A)   ionic bonds
B)   hydrogen bonds
C)   covalent bonds
D)   covalent bonds and hydrogen bondsE) C) and D)
F) A) and C)

Question 13

When carbon forms single covalent bonds with four other atoms, the atoms joined to the carbon form a

Accepted Answer

A)   sphere.
B)   cube.
C)   tetrahedron.
D)   line.
E)   plane.F) All of the above
G) B) and D)

Question 14

If cells are grown in a medium containing radioactive 32P, which of these molecules will be radioactively labeled?

Accepted Answer

A)   triacylglycerols
B)   nucleic acids
C)   fatty acids
D)   starchE) A) and B)
F) B) and C)

Question 15

Large organic molecules are generally synthesized by polymerization of a few types of simple subunits. Which of the following is an exception to this statement?

Accepted Answer

A)   a steroid
B)   cellulose
C)   DNA
D)   an enzymeE) None of the above
F) B) and C)

Question 16

Which of the following chemical equations describes a dehydration reaction?

Accepted Answer

A)   monosaccharide + monosaccharide disaccharide + H₂O
B)   monosaccharide + monosaccharide + H₂O disaccharide
C)   disaccharide monosaccharide + monosaccharide + H₂O
D)   disaccharide + H₂O monosaccharide + monosaccharideE) None of the above
F) B) and C)

Exam 3: Carbon and the Molecular Diversity of Life

Figure 3.3 -Which of the structures illustrated in Figure 3.3 is an impossible covalently bonded molecule?

Correct Answer
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Which of the following hydrocarbons has a double bond in its carbon skeleton?

Correct Answer
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A carbon atom is most likely to form which of the following bonds with other atoms?

Correct Answer
verified

Large organic molecules are generally synthesized by polymerization of a few types of simple subunits. Which of the following is an exception to this statement?

Correct Answer
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Which of the following is true of both starch and cellulose?

Correct Answer
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If cells are grown in a medium containing radioactive 35S, which of these molecules will be radioactively labeled?

Correct Answer
verified

Which chemical group is most likely to be responsible for an organic molecule behaving as a base (see Concept 2.5) ?

Correct Answer
verified

Which of the following chemical equations describes a hydrolysis reaction?

Correct Answer
verified

Figure 3.12 -At which bond in Figure 3.12 would water need to be added to achieve hydrolysis of the dipeptide, back to its component amino acids?

Correct Answer
verified

Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?

Correct Answer
verified

When carbon forms single covalent bonds with four other atoms, the atoms joined to the carbon form a

Correct Answer
verified

Why are hydrocarbons insoluble in water?

Correct Answer
verified

Which of the following chemical equations describes a dehydration reaction?

Correct Answer
verified

A chemist wishes to make an organic molecule less acidic. Which of the following functional groups should be added to the molecule in order to do so?

Correct Answer
verified

If cells are grown in a medium containing radioactive 32P, which of these molecules will be radioactively labeled?

Correct Answer
verified

A nucleotide is composed of

Correct Answer
verified

Exam 3: Carbon and the Molecular Diversity of Life

Figure 3.3 -Which of the structures illustrated in Figure 3.3 is an impossible covalently bonded molecule?

Correct AnswerverifiedShow Answer

Which of the following hydrocarbons has a double bond in its carbon skeleton?

Correct AnswerverifiedShow Answer

A carbon atom is most likely to form which of the following bonds with other atoms?

Correct AnswerverifiedShow Answer

Large organic molecules are generally synthesized by polymerization of a few types of simple subunits. Which of the following is an exception to this statement?

Correct AnswerverifiedShow Answer

Which of the following is true of both starch and cellulose?

Correct AnswerverifiedShow Answer

If cells are grown in a medium containing radioactive 35S, which of these molecules will be radioactively labeled?

Correct AnswerverifiedShow Answer

Which chemical group is most likely to be responsible for an organic molecule behaving as a base (see Concept 2.5) ?

Correct AnswerverifiedShow Answer

Which of the following chemical equations describes a hydrolysis reaction?

Correct AnswerverifiedShow Answer

Figure 3.12 -At which bond in Figure 3.12 would water need to be added to achieve hydrolysis of the dipeptide, back to its component amino acids?

Correct AnswerverifiedShow Answer

Which type of interaction stabilizes the α helix and the β pleated sheet structures of proteins?

Correct AnswerverifiedShow Answer

When carbon forms single covalent bonds with four other atoms, the atoms joined to the carbon form a

Correct AnswerverifiedShow Answer

Why are hydrocarbons insoluble in water?

Correct AnswerverifiedShow Answer

Which of the following chemical equations describes a dehydration reaction?

Correct AnswerverifiedShow Answer

A chemist wishes to make an organic molecule less acidic. Which of the following functional groups should be added to the molecule in order to do so?

Correct AnswerverifiedShow Answer

If cells are grown in a medium containing radioactive 32P, which of these molecules will be radioactively labeled?

Correct AnswerverifiedShow Answer

A nucleotide is composed of

Correct AnswerverifiedShow Answer

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