Question 1

In the citric acid cycle, carbon dioxide is produced in some reactions, but it is not consumed.

Accepted Answer

A) True 
 B)False

Question 2

In the citric acid cycle, NADH is produced in some reactions, but it is not consumed.

Accepted Answer

A) True 
 B)False

Question 3

For each pair of electrons passing from NADH to oxygen, how many ATP molecules can be generated?

Accepted Answer

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

Question 4

After acetyl CoA enters the citric acid cycle, the coenzyme A portion of the molecule:

Accepted Answer

A)   combines with oxaloacetate.
B)   combines with citrate.
C)   is oxidized.
D)   is reduced.
E)   is released.F) A) and B)
G) B) and D)

Question 5

The number of ATP molecules generated from each NADH produced in glycolysis is _______.

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) All of the above
G) A) and E)

Question 6

In glycolysis, ATP is consumed in some reactions and produced in others.

Accepted Answer

A) True 
 B)False

Question 7

Where in the cell does glycolysis occur?

Accepted Answer

A)   the cytosol
B)   mitochondria
C)   the nucleus
D)   the endoplasmic reticulum
E)   chloroplastsF) A) and D)
G) A) and E)

Question 8

For each pair of electrons that passes from NADH to oxygen, three molecules of ATP are formed during oxidative phosphorylation.

Accepted Answer

A) True 
 B)False

Question 9

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) C) and D)
G) A) and E)

Question 10

Which of the following processes occurs in both lactate fermentation and alcohol fermentation?

Accepted Answer

A)   formation of acetyl CoA
B)   release of carbon dioxide
C)   pumping of protons
D)   oxidation of NADH
E)   activation of ATP synthaseF) None of the above
G) B) and E)

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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) B) and C)
G) None of the above

Question 13

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) All of the above
G) A) and B)

Question 14

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 C)
G) B) and C)

Question 15

Most of the carriers of the electron transport chain are:

Accepted Answer

A)   in the cytosol.
B)   in the mitochondrial matrix.
C)   contained between the outer and inner mitochondrial membranes.
D)   embedded in the inner mitochondrial membrane.
E)   embedded in the outer mitochondrial membrane.F) D) and E)
G) B) and D)

Question 16

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

Accepted Answer

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

Question 17

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 E)
G) None of the above

Question 18

For every molecule of glucose that begins glycolysis, how many molecules of acetyl CoA are produced?

Accepted Answer

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

Question 19

As part of the cleavage step in glycolysis, glucose is:

Accepted Answer

A)   converted to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate.
B)   phosphorylated to glucose 6-phosphate.
C)   oxidized to 1,3-bisphosphoglycerate.
D)   reduced to phosphoenolpyruvate.
E)   converted by the enzyme isomerase to fructose.F) A) and B)
G) A) and E)

Question 20

Cytochromes are unique electron carriers in that they can accept protons as well as electrons.

Accepted Answer

A) True 
 B)False

Exam 6: Respiration

In the citric acid cycle, carbon dioxide is produced in some reactions, but it is not consumed.

Correct AnswerverifiedShow Answer

In glycolysis, ATP is consumed in some reactions and produced in others.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The number of ATP molecules generated from each NADH produced in glycolysis is _______.

Correct AnswerverifiedShow Answer

For each pair of electrons that passes from NADH to oxygen, three molecules of ATP are formed during oxidative phosphorylation.

Correct AnswerverifiedShow Answer

Which of the following processes occurs in both lactate fermentation and alcohol fermentation?

Correct AnswerverifiedShow Answer

For every molecule of glucose that begins glycolysis, how many molecules of acetyl CoA are produced?

Correct AnswerverifiedShow Answer

After acetyl CoA enters the citric acid cycle, the coenzyme A portion of the molecule:

Correct AnswerverifiedShow Answer

As part of the cleavage step in glycolysis, glucose is:

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

For each pair of electrons passing from NADH to oxygen, how many ATP molecules can be generated?

Correct AnswerverifiedShow Answer

Most of the carriers of the electron transport chain are:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Where in the cell does glycolysis occur?

Correct AnswerverifiedShow Answer

In the citric acid cycle, NADH is produced in some reactions, but it is not consumed.

Correct AnswerverifiedShow Answer

Cytochromes are unique electron carriers in that they can accept protons as well as electrons.

Correct AnswerverifiedShow Answer

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

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 AnswerverifiedShow Answer

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

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