Question 1

Most of the ATP formed in respiration is produced by reactions associated with:

Accepted Answer

A)  the electron transport chain.
B)  the citric acid cycle.
C)  glycolysis.
D)  fermentation.
E)  the conversion of pyruvate to acetyl CoA.F) A) and D)
G) A) and C)

Question 2

Which of the following statements concerning fermentation is FALSE?

Accepted Answer

A)  It occurs under anaerobic conditions.
B)  It involves O2 as the ultimate electron acceptor.
C)  It involves the breakdown of organic molecules.
D)  It releases less than 686 kcal/mole of glucose.
E)  It is an exergonic process.F) A) and D)
G) A) and B)

Question 3

Formation of ATP from ADP and phosphate as a result of electron transport occurs in:

Accepted Answer

A)  the citric acid cycle.
B)  the formation of acetyl CoA.
C)  fermentation.
D)  glycolysis.
E)  oxidative phosphorylation.F) A) and C)
G) A) and E)

Question 4

In the citric acid cycle, how many molecules of FADH are produced per molecule of glucose?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) D) and E)
G) None of the above

Question 5

Which of the following statements concerning glycolysis is FALSE?

Accepted Answer

A)  It is considered a primitive process.
B)  It is an aerobic process.
C)  It occurs in a series of 10 steps.
D)  It is carried out by virtually all cells.
E)  Its reactions are catalyzed by specific enzymes.F) B) and E)
G) C) and E)

Question 6

Ubiquinone is also called coenzyme Q.

Accepted Answer

A) True 
 B)False

Question 7

The electrochemical gradient resulting from electron transport is due to differences in ______ across the inner mitochondrial membrane.

Accepted Answer

A)  only the electric charge
B)  proton concentration only
C)  electric charge and proton concentration
D)  only the ATP concentration
E)  ATP and NAD+ concentrationsF) B) and D)
G) B) and E)

Question 8

More energy is obtained when glucose is oxidized under aerobic conditions rather than anaerobic conditions.

Accepted Answer

A) True 
 B)False  True

Question 9

For each molecule of glucose that completes glycolysis, how many NAD+ molecules are reduced?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) C) and D)
G) A) and D)

Question 10

The number of ATP molecules generated from each NADH produced in the conversion of pyruvate to acetyl CoA is _______.

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) None of the above
G) C) and D) C

Question 11

Which of the following statements about the reactions of glucose oxidation is FALSE?

Accepted Answer

A)  The glucose molecule is hydrolyzed.
B)  Hydrogen atoms are removed.
C)  Oxygen is oxidized.
D)  Energy is released.
E)  Electrons go from higher to lower energy levels.F) A) and E)
G) B) and D)

Question 12

For each glucose molecule that begins respiration, 38 ATPs are formed.

Accepted Answer

A) True 
 B)False

Question 13

In the citric acid cycle, ATP is produced in some reactions and consumed in others.

Accepted Answer

A) True 
 B)False

Question 14

In the citric acid cycle, how many molecules of NADH are produced per molecule of glucose?

Accepted Answer

A)  0
B)  1
C)  2
D)  4
E)  6F) A) and E)
G) A) and B)

Question 15

The energy released by the flow of electrons along the electron transport chain is used directly to:

Accepted Answer

A)  form ATP from ADP and phosphate.
B)  oxidize NADH.
C)  reduce FAD.
D)  decarboxylate citrate.
E)  pump protons.F) B) and C)
G) B) and D)

Question 16

The preparatory phase of glycolysis involves:

Accepted Answer

A)  2 molecules of ATP only.
B)  2 molecules of NAD+ only.
C)  2 molecules of NADH only.
D)  1 molecule of ATP and 1 molecule of NADH.
E)  1 molecule of ATP and 1 molecule of NAD+.F) A) and B)
G) B) and D)

Question 17

The complete oxidation of one molecule of glucose requires two turns around the citric acid cycle.

Accepted Answer

A) True 
 B)False

Question 18

Under anaerobic conditions, yeasts and most plant cells convert pyruvate to:

Accepted Answer

A)  acetyl CoA.
B)  lactate.
C)  ethanol and carbon dioxide.
D)  ATP.
E)  glucose.F) B) and D)
G) A) and B) C

Question 19

Who am I? I move freely within the mitochondrial membrane and thus shuttle electrons between other carriers.

Accepted Answer

A)  CoQ
B)  Fe-S proteins
C)  cytochromes
D)  cytochrome oxidase
E)  CoAF) A) and D)
G) C) and D)

Question 20

Which of the following does NOT occur during respiration?

Accepted Answer

A)  hydrolysis of starch to glucose
B)  formation of acetyl CoA
C)  electron transport chain
D)  citric acid cycle
E)  glycolysisF) C) and D)
G) B) and D)

Exam 6: Respiration

Most of the ATP formed in respiration is produced by reactions associated with:

Correct AnswerverifiedShow Answer

Which of the following statements concerning fermentation is FALSE?

Correct AnswerverifiedShow Answer

Formation of ATP from ADP and phosphate as a result of electron transport occurs in:

Correct AnswerverifiedShow Answer

In the citric acid cycle, how many molecules of FADH are produced per molecule of glucose?

Correct AnswerverifiedShow Answer

Which of the following statements concerning glycolysis is FALSE?

Correct AnswerverifiedShow Answer

Ubiquinone is also called coenzyme Q.

Correct AnswerverifiedShow Answer

The electrochemical gradient resulting from electron transport is due to differences in ______ across the inner mitochondrial membrane.

Correct AnswerverifiedShow Answer

More energy is obtained when glucose is oxidized under aerobic conditions rather than anaerobic conditions.

Correct AnswerverifiedTrue

For each molecule of glucose that completes glycolysis, how many NAD+ molecules are reduced?

Correct AnswerverifiedShow Answer

The number of ATP molecules generated from each NADH produced in the conversion of pyruvate to acetyl CoA is _______.

Correct AnswerverifiedC

Which of the following statements about the reactions of glucose oxidation is FALSE?

Correct AnswerverifiedShow Answer

For each glucose molecule that begins respiration, 38 ATPs are formed.

Correct AnswerverifiedShow Answer

In the citric acid cycle, ATP is produced in some reactions and consumed in others.

Correct AnswerverifiedShow Answer

In the citric acid cycle, how many molecules of NADH are produced per molecule of glucose?

Correct AnswerverifiedShow Answer

The energy released by the flow of electrons along the electron transport chain is used directly to:

Correct AnswerverifiedShow Answer

The preparatory phase of glycolysis involves:

Correct AnswerverifiedShow Answer

The complete oxidation of one molecule of glucose requires two turns around the citric acid cycle.

Correct AnswerverifiedShow Answer

Under anaerobic conditions, yeasts and most plant cells convert pyruvate to:

Correct AnswerverifiedC

Who am I? I move freely within the mitochondrial membrane and thus shuttle electrons between other carriers.

Correct AnswerverifiedShow Answer

Which of the following does NOT occur during respiration?

Correct AnswerverifiedShow Answer

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True

For each molecule of glucose that completes glycolysis, how many NAD⁺ molecules are reduced?

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C

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C

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