Question 1

Why do organisms without oxygen need to convert pyruvate to lactate?

Accepted Answer

A)  in order to regenerate NAD+
B)  because lactate is needed to produce ATP
C)  because pyruvate is toxic to the cells
D)  in order to use lactate in the citric acid cycle
E)  because the conversion provides much more ATP for the cell

Question 2

Glycolysis is likely to have evolved before the citric acid cycle and electron transport chain because

Accepted Answer

A)  it has an older fossil record.
B)  it is found in all living organisms.
C)  it occurs inside the mitochondria.
D)  the process is found in all primitive bacteria but lacking in many advanced organisms.
E)  it produces more ATP than do the citric acid cycle and electron transport chain.

Question 3

Which of the following statements about fermentation is not true?

Accepted Answer

A)  Fermentation involves the citric acid cycle.
B)  Fermentation does not require oxygen.
C)  Fermentation can produce lactic acid.
D)  Fermentation produces a net two ATP molecules.
E)  Fermentation can produce alcohol.

Question 4

The energy difference between the reactant glucose and oxygen molecules and the product water and carbon dioxide is 686 kilocalories,yet the 36 ATP molecules produced are only storing 263 kilocalories in their outermost phosphate bond.The rest of the energy went

Accepted Answer

A)  to the ADP fragment of the ATP molecule.
B)  into providing the energy for life.
C)  to power the electron transport chain.
D)  to provide heat that is soon lost from the organism.
E)  nowhere,but was destroyed.

Question 5

What phase(s) of cellular respiration produce(s) NADH + H+?

Accepted Answer

A)  glycolysis
B)  preparatory reaction
C)  citric acid cycle
D)  glycolysis and preparatory reaction
E)  glycolysis,preparatory reaction,and citric acid cycle

Question 6

NADH and FADH2 bring electrons to the electron transport chain during cellular respiration.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements about glycolysis is true?

Accepted Answer

A)  Glycolysis results in the release of carbon dioxide.
B)  Glycolysis is a cyclical reaction.
C)  Glycolysis is a reduction reaction where only glucose is reduced.
D)  Glycolysis occurs twice per glucose molecule.
E)  Glycolysis breaks glucose down to two pyruvate molecules.

Question 8

The most efficient method to produce ATP in animal cells is by glycolysis.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following reactions is NOT part of the cellular respiration pathway?

Accepted Answer

A)  glycolysis
B)  citric acid cycle
C)  Calvin cycle
D)  electron transport chain
E)  preparatory reaction (prep)

Question 10

The final products of glycolysis are

Accepted Answer

A)  2 pyruvate,2 ATP,and 2 NADH + H+.
B)  1 pyruvate and 2 ATP.
C)  1 pyruvate and 2 NADH + H+.
D)  2 ATP and 2 NADH + H+.
E)  2 pyruvate.

Question 11

Which of the following is not a consequence of the lactate that results from fermentation in the muscles?

Accepted Answer

A)  It triggers ongoing heavier breathing to provide further oxygen for the muscles.
B)  Much of the lactate is transported to the liver where it is converted to pyruvate.
C)  Some lactate converted to pyruvate is converted back to glucose.
D)  Some lactate converted to pyruvate is then completely broken down.
E)  It is stored in muscle cells for later ATP production.

Question 12

Why is cellular respiration organized into four phases?

Accepted Answer

A)  So that the energy within the glucose molecule can be released in a stepwise fashion.
B)  So that it can take place within different cells.
C)  So that most of the energy can be released as body heat.
D)  So that oxidation can occur without reduction.
E)  So that the body can make energy from different substrates.

Question 13

List,in order,the stages of aerobic cellular respiration and indicate where they occur in the cell.

Accepted Answer

Glycolysis is first and it occurs within...

Question 14

Pyruvate contains less chemical energy than glucose.

Accepted Answer

A) True 
 B)False

Question 15

What is the most likely reason that cellular respiration would shift from an aerobic state into an anaerobic state?

Accepted Answer

A)  The individual was exercising at a level beyond their capability and entered into oxygen debt.
B)  A smoker has developed emphysema and has decreased lung capacity.
C)  The individual has had a stroke in the left hemisphere of their brain.
D)  None of the answer choices could cause an individual to shift into an anaerobic state.
E)  All of the answer choices are reasons that an individual could shift into an anaerobic state.

Question 16

Which of the following does not describe the role of NAD+ in cellular respiration?

Accepted Answer

A)  It accepts two electrons.
B)  It is a coenzyme.
C)  It helps to oxidize the substrate.
D)  It is reduced.
E)  It provides the energy for the reaction.

Question 17

Where does the preparatory reaction take place within the cell?

Accepted Answer

A)  mitochondrial matrix
B)  mitochondrial cristae
C)  nucleus
D)  cytoplasm
E)  endoplasmic reticulum

Question 18

Which is NOT correct about the preparatory reaction?

Accepted Answer

A)  It connects glycolysis to the citric acid cycle.
B)  CO2 is given off.
C)  Pyruvate is converted to a two-carbon acetyl group.
D)  NAD+ goes to NADH + H+ as acetyl-CoA forms.
E)  The reaction occurs once per glucose molecule.

Question 19

All of the ATP molecules formed by the complete oxidation of glucose result from the electron transfer chain.

Accepted Answer

A) True 
 B)False

Question 20

There is a net gain of four ATPs as a result of glycolysis.

Accepted Answer

A) True 
 B)False

Exam 7: Cellular Respiration

Which of the following statements about fermentation is not true?

Correct AnswerverifiedShow Answer

Glycolysis is likely to have evolved before the citric acid cycle and electron transport chain because

Correct AnswerverifiedShow Answer

What is the most likely reason that cellular respiration would shift from an aerobic state into an anaerobic state?

Correct AnswerverifiedShow Answer

There is a net gain of four ATPs as a result of glycolysis.

Correct AnswerverifiedShow Answer

The most efficient method to produce ATP in animal cells is by glycolysis.

Correct AnswerverifiedShow Answer

All of the ATP molecules formed by the complete oxidation of glucose result from the electron transfer chain.

Correct AnswerverifiedShow Answer

The final products of glycolysis are

Correct AnswerverifiedShow Answer

Why do organisms without oxygen need to convert pyruvate to lactate?

Correct AnswerverifiedShow Answer

Pyruvate contains less chemical energy than glucose.

Correct AnswerverifiedShow Answer

Which of the following reactions is NOT part of the cellular respiration pathway?

Correct AnswerverifiedShow Answer

Why is cellular respiration organized into four phases?

Correct AnswerverifiedShow Answer

Which is NOT correct about the preparatory reaction?

Correct AnswerverifiedShow Answer

The energy difference between the reactant glucose and oxygen molecules and the product water and carbon dioxide is 686 kilocalories,yet the 36 ATP molecules produced are only storing 263 kilocalories in their outermost phosphate bond.The rest of the energy went

Correct AnswerverifiedShow Answer

NADH and FADH2 bring electrons to the electron transport chain during cellular respiration.

Correct AnswerverifiedShow Answer

Which of the following does not describe the role of NAD+ in cellular respiration?

Correct AnswerverifiedShow Answer

Where does the preparatory reaction take place within the cell?

Correct AnswerverifiedShow Answer

Which of the following is not a consequence of the lactate that results from fermentation in the muscles?

Correct AnswerverifiedShow Answer

Which of the following statements about glycolysis is true?

Correct AnswerverifiedShow Answer

List,in order,the stages of aerobic cellular respiration and indicate where they occur in the cell.

Correct AnswerverifiedGlycolysis is first and it occurs within...View AnswerShow Answer

What phase(s) of cellular respiration produce(s) NADH + H+?

Correct AnswerverifiedShow Answer

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NADH and FADH₂ bring electrons to the electron transport chain during cellular respiration.

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Which of the following does not describe the role of NAD⁺ in cellular respiration?

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Glycolysis is first and it occurs within...
View Answer

What phase(s) of cellular respiration produce(s) NADH + H⁺?

Correct Answer
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