Question 1

Which of the following does NOT occur during yeast fermentation?

Accepted Answer

A)   Acetylaldehyde is reduced to make ethanol.
B)   Decrease in NADH.
C)   Lactate is produced.
D)   Pyruvate is broken down into CO2 and acetylaldehyde.
E)   NADH is oxidized to NAD+

Question 2

NADH and FADH2 donate their electrons to protein complex I.

Accepted Answer

A) True 
 B)False

Question 3

Which pathway shows the correct path of electron transfer from a molecule of NADH?

Accepted Answer

A)   NADH hydrogenase ? ubiquinone ? cytochrome oxidase ? cytochrome b-c1 ? cytochrome c ? O2
B)   NADH hydrogenase ? ubiquinone ? cytochrome c ? cytochrome b-c1? cytochrome oxidase ? O2
C)   ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? NADH hydrogenase ? O2
D)   NADH hydrogenase ? ubiquinone ? cytochrome b-c1? cytochrome c ? cytochrome oxidase ? O2
E)   ubiquinone ? cytochrome b-c1? cytochrome c ? NADH hydrogenase ? cytochrome oxidase ? O2

Question 4

Which of the following is INCORRECT for ethanol fermentation?

Accepted Answer

A)   A source of organic sugar is required, for instance from malt.
B)   Results in a net production of NADH.
C)   Glucose is oxidized to pyruvate as one of the steps.
D)   Carbon dioxide and ATP are produced.
E)   NADH is used to reduce acetaldehyde to ethanol. B

Question 5

In the citric acid cycle, succinate is oxidized to form

Accepted Answer

A)   fumarate.
B)   succinate.
C)   citrate.
D)   malate.
E)   oxaloacetate.

Question 6

Which of the following is NOT a process of aerobic respiration?

Accepted Answer

A)   citric acid cycle
B)   glycolysis
C)   acetyl CoA formation
D)   oxidative phosphorylation
E)   lactate fermentation

Question 7

Secondary metabolites like caffeine are produced mainly from plant sources.

Accepted Answer

A) True 
 B)False

Question 8

The aerobic breakdown of glucose yields 34 to 38 ATP, while the anaerobic breakdown of glucose yields 20 ATP.

Accepted Answer

A) True 
 B)False

Question 9

The enzyme responsible for oxidizing pyruvate once it enters the mitochondrial matrix is

Accepted Answer

A)   pyruvate oxidase
B)   pyruvate dehydrogenase.
C)   hexokinase
D)   ATP synthase.
E)   peptidase.

Question 10

The equation, C6H12O6 + 6O2 ?6CO2 + 6H2O (ATP + Heat) , describes a reaction that

Accepted Answer

A)   is endergonic.
B)   requires energy.
C)   occurs in plants only.
D)   is exergonic.
E)   is anabolic.

Question 11

Proteins and fats may be used as energy sources to drive aerobic respiration.

Accepted Answer

A) True 
 B)False

Question 12

Which compound has the highest free energy and produces the most ATP when oxidized?

Accepted Answer

A)   acetyl CoA
B)   glucose
C)   pyruvate
D)   carbon
E)   both pyruvate and carbon

Question 13

Which of the following function: location relationship is INCORRECT?

Accepted Answer

A)   acetyl CoA formation; cytosol
B)   citric acid cycle; mitochondria matrix
C)   oxidative phosphorylation; mitochondria inner membrane
D)   glycolysis; cytosol
E)   electron transport chain and ATP synthase; mitochondria inner membrane

Question 14

During the energy investment phase of glycolysis there is a decrease of free energy that allows later reactions to be exergonic.

Accepted Answer

A) True 
 B)False  False

Question 15

Which would be TRUE if a metabolic poison were to completely inhibit the function of mitochondrial ATP synthase?

Accepted Answer

A)   The pH difference across the inner mitochondrial membrane would decrease.
B)   The pH difference across the inner mitochondrial membrane would increase.
C)   ATP synthesis would increase.
D)   Oxygen consumption would decrease.
E)   The accumulation of NADH would increase.

Question 16

When a molecule of NAD+ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced.

Accepted Answer

A) True 
 B)False

Question 17

Cellular respiration produces the most chemical in the form of ATP from which of the following?

Accepted Answer

A)   the electron transport chain
B)   the citric acid cycle
C)   substrate-level phosphorylation
D)   glycolysis
E)   oxidative phosphorylation E

Question 18

Which of the following statements is TRUE of both aerobic and anaerobic respiration?

Accepted Answer

A)   Both use glycolysis to oxidize glucose to pyruvate.
B)   Both produce NADH as high-energy intermediates.
C)   Both produce either lactic acid or enthanol as a bioproduct.
D)   Both use glycolysis to oxidize glucose to pyruvate and both produce NADH as high-energy intermediates.
E)   Both produce NADH as high-energy intermediates and both produce either lactic acid or enthanol as a bioproduct.

Question 19

Vanillin is to flavonoids as atropine is to

Accepted Answer

A)   flavonoids.
B)   terpenoids.
C)   polyketides.
D)   alkoloids.
E)   B-carotenes.

Question 20

The proton motive force is key to chemiosis because the H+ electrochemical gradient is lower in the intermembrane space than inside the matrix.

Accepted Answer

A) True 
 B)False

Exam 7: Cellular Respiration, Fermentation, and Secondary Metabolism

Which of the following does NOT occur during yeast fermentation?

Correct AnswerverifiedShow Answer

NADH and FADH2 donate their electrons to protein complex I.

Correct AnswerverifiedShow Answer

Which pathway shows the correct path of electron transfer from a molecule of NADH?

Correct AnswerverifiedShow Answer

Which of the following is INCORRECT for ethanol fermentation?

Correct AnswerverifiedB

In the citric acid cycle, succinate is oxidized to form

Correct AnswerverifiedShow Answer

Which of the following is NOT a process of aerobic respiration?

Correct AnswerverifiedShow Answer

Secondary metabolites like caffeine are produced mainly from plant sources.

Correct AnswerverifiedShow Answer

The aerobic breakdown of glucose yields 34 to 38 ATP, while the anaerobic breakdown of glucose yields 20 ATP.

Correct AnswerverifiedShow Answer

The enzyme responsible for oxidizing pyruvate once it enters the mitochondrial matrix is

Correct AnswerverifiedShow Answer

The equation, C6H12O6 + 6O2 ?6CO2 + 6H2O (ATP + Heat) , describes a reaction that

Correct AnswerverifiedShow Answer

Proteins and fats may be used as energy sources to drive aerobic respiration.

Correct AnswerverifiedShow Answer

Which compound has the highest free energy and produces the most ATP when oxidized?

Correct AnswerverifiedShow Answer

Which of the following function: location relationship is INCORRECT?

Correct AnswerverifiedShow Answer

During the energy investment phase of glycolysis there is a decrease of free energy that allows later reactions to be exergonic.

Correct AnswerverifiedFalse

Which would be TRUE if a metabolic poison were to completely inhibit the function of mitochondrial ATP synthase?

Correct AnswerverifiedShow Answer

When a molecule of NAD+ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced.

Correct AnswerverifiedShow Answer

Cellular respiration produces the most chemical in the form of ATP from which of the following?

Correct AnswerverifiedE

Which of the following statements is TRUE of both aerobic and anaerobic respiration?

Correct AnswerverifiedShow Answer

Vanillin is to flavonoids as atropine is to

Correct AnswerverifiedShow Answer

The proton motive force is key to chemiosis because the H+ electrochemical gradient is lower in the intermembrane space than inside the matrix.

Correct AnswerverifiedShow Answer

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NADH and FADH₂ donate their electrons to protein complex I.

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B

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The equation, C₆H₁₂O₆ + 6O₂ ?6CO₂ + 6H₂O (ATP + Heat) , describes a reaction that

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False

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When a molecule of NAD⁺ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced.

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E

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The proton motive force is key to chemiosis because the H⁺ electrochemical gradient is lower in the intermembrane space than inside the matrix.

Correct Answer
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