Question 1

After an amide is hydrolyzed, it undergoes further reaction. Which of the following occurs after an amide is hydrolyzed?

Accepted Answer

A)   hydration
B)   dehydration
C)   an acid-base reaction
D)   another hydrolysis
E)   condensationF) B) and C)
G) C) and D)

Question 2

Which food is NOT high in niacin?

Accepted Answer

A)   oranges
B)   anchovies
C)   bran
D)   peanuts
E)   tunaF) B) and E)
G) None of the above

Question 3

The reaction of a carboxylic acid and an alcohol in the presence of a catalyst produces an ester and a molecule of water. Which of the labeled atoms below are involved in making the molecule of water?

Accepted Answer

A)   a and d
B)   b and d
C)   b, c, and d
D)   a, c, and d
E)   c, d, and eF) A) and D)
G) B) and C) C

Question 4

What is the product when this compound undergoes oxidation?

Accepted Answer

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

Question 5

Which classification of alcohols can undergo oxidation to yield a ketone?

Accepted Answer

A)   Both primary and secondary alcohols yield ketones when oxidized.
B)   Both secondary and tertiary alcohols yield ketones when oxidized.
C)   Only primary alcohols yield ketones when oxidized.
D)   Only secondary alcohols yield ketones when oxidized.
E)   Only tertiary alcohols yield ketones when oxidized.F) A) and B)
G) B) and D)

Question 6

What does [O] represent in the following reaction?

Accepted Answer

A)   the oxidizing agent
B)   the species that is oxidized
C)   the reducing agent
D)   the species that is protonated
E)   atomic oxygenF) C) and E)
G) A) and B)

Question 7

What is the missing reactant for the following reaction?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and E)
G) A) and B) B

Question 8

The enzyme that converts phenylalanine to tyrosine is an oxidoreductase that requires BH4, which is converted to BH4OH over the course of the reaction. BH4 is a(n)

Accepted Answer

A)   enzyme.
B)   protein.
C)   coenzyme.
D)   amino acid.
E)   lipid.F) None of the above
G) C) and D)

Question 9

What is the purpose of NAD+ in the body?

Accepted Answer

A)   It is an oxidizing agent.
B)   It is a reducing agent.
C)   It donates oxygen.
D)   It donates hydrogen.
E)   It accepts oxygen.F) A) and E)
G) A) and D)

Question 10

Which of the following is the missing reactant in the reaction below, the hydrolysis of a thioester?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and D)
G) All of the above

Question 11

What are the products of the following reaction?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) A) and E)
G) C) and E)

Question 12

Ascorbic acid, or vitamin C, is a water soluble vitamin. Which of the following interactions is primarily responsible for ascorbic acid's water solubility?

Accepted Answer

A)   dispersion forces
B)   dipole-dipole forces
C)   hydrogen bonding forces
D)   ionic bonding
E)   covalent bondingF) B) and C)
G) A) and E)

Question 13

In the following reaction, the sulfate ion does not react. What is this ion called?

Accepted Answer

A)   This ion has no special name.
B)   It is a reactive ion.
C)   It is a spectator ion.
D)   It is an explosive ion.
E)   It is a nonfunctional ion.F) A) and B)
G) D) and E)

Question 14

What is the product of the following hydrolysis reaction between an ester and water?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and E)
G) A) and B)

Question 15

The following reaction is the hydrogenation of an unsaturated fatty acid. Which of the following choices best describe molecules A and B?

Accepted Answer

A)   Both A and B are fats.
B)   Both A and B are oils.
C)   A is a fat and B is an oil.
D)   A is an oil and B is a fat.
E)   A is an oil and B is a trans-fat.F) B) and E)
G) A) and B)

Question 16

Cellular respiration and the combustion of fuel in a car engine are similar in many ways, but they also differ. What is one way in which they are different?

Accepted Answer

A)   Cellular respiration occurs in many steps and the combustion of fuel in a single step.
B)   Cellular respiration is exothermic and the combustion of fuel is endothermic.
C)   Cellular respiration is endothermic and the combustion of fuel is exothermic.
D)   Cellular respiration is fast and the combustion of fuel is slow.
E)   Cellular respiration requires oxygen and the combustion of fuel does not.F) C) and E)
G) A) and D)

Question 17

Which of the following partial structures is an acyl group?

Accepted Answer

A)  a
B)  b
C)  c
D)  d
E)  eF) B) and D)
G) B) and E) B

Question 18

The reaction of fatty acid A is an example of a(n)

Accepted Answer

A)   neutralization.
B)   combustion.
C)   oxidation.
D)   reduction.
E)   condensation.F) A) and B)
G) A) and C)

Question 19

Which of the following is NOT an example of an oxidation-reduction reaction?

Accepted Answer

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

Question 20

What type of reaction is this?

Accepted Answer

A)   oxidation
B)   reduction
C)   combustion
D)   hydration
E)   dehydrationF) C) and D)
G) None of the above

Exam 10: The Reactions of Organic Functional Groups in Biochemistry

After an amide is hydrolyzed, it undergoes further reaction. Which of the following occurs after an amide is hydrolyzed?

Correct AnswerverifiedShow Answer

Which food is NOT high in niacin?

Correct AnswerverifiedShow Answer

The reaction of a carboxylic acid and an alcohol in the presence of a catalyst produces an ester and a molecule of water. Which of the labeled atoms below are involved in making the molecule of water?

Correct AnswerverifiedC

What is the product when this compound undergoes oxidation?

Correct AnswerverifiedShow Answer

Which classification of alcohols can undergo oxidation to yield a ketone?

Correct AnswerverifiedShow Answer

What does [O] represent in the following reaction?

Correct AnswerverifiedShow Answer

What is the missing reactant for the following reaction?

Correct AnswerverifiedB

The enzyme that converts phenylalanine to tyrosine is an oxidoreductase that requires BH4, which is converted to BH4OH over the course of the reaction. BH4 is a(n)

Correct AnswerverifiedShow Answer

What is the purpose of NAD+ in the body?

Correct AnswerverifiedShow Answer

Which of the following is the missing reactant in the reaction below, the hydrolysis of a thioester?

Correct AnswerverifiedShow Answer

What are the products of the following reaction?

Correct AnswerverifiedShow Answer

Ascorbic acid, or vitamin C, is a water soluble vitamin. Which of the following interactions is primarily responsible for ascorbic acid's water solubility?

Correct AnswerverifiedShow Answer

In the following reaction, the sulfate ion does not react. What is this ion called?

Correct AnswerverifiedShow Answer

What is the product of the following hydrolysis reaction between an ester and water?

Correct AnswerverifiedShow Answer

The following reaction is the hydrogenation of an unsaturated fatty acid. Which of the following choices best describe molecules A and B?

Correct AnswerverifiedShow Answer

Cellular respiration and the combustion of fuel in a car engine are similar in many ways, but they also differ. What is one way in which they are different?

Correct AnswerverifiedShow Answer

Which of the following partial structures is an acyl group?

Correct AnswerverifiedB

The reaction of fatty acid A is an example of a(n)

Correct AnswerverifiedShow Answer

Which of the following is NOT an example of an oxidation-reduction reaction?

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What type of reaction is this?

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C

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B

The enzyme that converts phenylalanine to tyrosine is an oxidoreductase that requires BH₄, which is converted to BH₄OH over the course of the reaction. BH₄ is a(n)

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What is the purpose of NAD⁺ in the body?

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B

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