Question 1

High levels of citrate in the cell would result in which of the following?

Accepted Answer

A)  inhibition of phosphofructokinase and the slow down of glycolysis
B)  inhibition of citrate synthase and the slow down of glycolysis
C)  inhibition of phosphofructokinase and the slow down of the Krebs cycle
D)  inhibition of citrate synthase and the slow down of the Krebs cycleE) A) and B)
F) A) and C)

Question 2

In muscle cells,fermentation produces not alcohol but

Accepted Answer

A)  ATP.
B)  NADH.
C)  pyruvate.
D)  kinetic energy.
E)  lactic acid.F) A) and D)
G) B) and C)

Question 3

You are examining some live cells in a Petri dish,when you begin to imagine what you would do if suddenly one of them were to burst into flames.Of course,in order for this to happen the cell would have to

Accepted Answer

A)  transfer electrons to intermediate electron carriers before transferring them to oxygen.
B)  transfer electrons directly to oxygen,skipping the intermediate electron carriers.
C)  transfer electrons directly to carbon dioxide,skipping the intermediate electron carriers.
D)  transfer electrons to intermediate electron carriers before transferring them to carbon dioxide.E) None of the above
F) All of the above

Question 4

Coenzyme electron carrier;associated with Krebs cycle only.

Accepted Answer

A)  ATP
B)  FAD
C)  G3P
D)  NAD+
E)  acetyl-CoAF) B) and C)
G) B) and E)

Question 5

Simple molecules are further broken down in cells in a process called _________,during which energy stored in their chemical bonds is used to power the production of ATP.

Accepted Answer

A)  photosynthesis
B)  anabolism
C)  respiration
D)  muscle contractionE) A) and D)
F) None of the above

Question 6

Out of the total amount of free energy potentially available from total oxidation of glucose,the number of ATP made by cells is equal to an energy efficiency of about

Accepted Answer

A)  2%.
B)  25%.
C)  32%.
D)  75%.
E)  90%.F) C) and E)
G) C) and D)

Question 7

A molecule that stores energy by linking charged phosphate groups near each other is called

Accepted Answer

A)  ATP.
B)  NADH.
C)  FADH.
D)  cyclic AMP.
E)  pyruvatE.F) B) and C)
G) All of the above

Question 8

In glycolysis,a major portion of the energy remains in the final product,which is called ________.

Accepted Answer

A)  glucose
B)  carbon dioxide
C)  ATP
D)  pyruvateE) A) and B)
F) A) and D)

Question 9

In eukaryotes,the glycolytic reactions take place in the

Accepted Answer

A)  mitochondria of the cell.
B)  cytoplasm of the cell.
C)  ribosomes of the cell.
D)  endoplasmic reticulum of each cell.
E)  Golgi bodies of the cell.F) All of the above
G) B) and D)

Question 10

Fats undergo a process called ________ oxidation,in which the products are acetyl coenzyme molecules.

Accepted Answer

A)  alpha
B)  beta
C)  gamma
D)  omegaE) All of the above
F) A) and D)

Question 11

The enzymes catalyzing the reactions of glycolysis are found in the

Accepted Answer

A)  mitochondriA.
B)  cytoplasm.
C)  chloroplasts.
D)  nucleus.
E)  Golgi apparatus.F) C) and D)
G) B) and E)

Question 12

An electron carrier that is used in harvesting energy from glucose molecules in a series of gradual steps in the cytoplasm is

Accepted Answer

A)  pyruvate.
B)  cyclic AMP.
C)  ATP.
D)  NAD+.
E)  NADH.F) B) and E)
G) None of the above

Question 13

In order to lose weight and reduce body fat,a friend of yours decided to eliminate all fat from their diet,while consuming unrestricted amounts of carbohydrates.Aside from being an unhealthy way to try to lose weight,why would this approach be unsuccessful at reducing body fat?

Accepted Answer

A)  Excess acetyl-CoA from glycolysis will be channeled into production of body fat.
B)  Excess acetyl-CoA from the Krebs cycle will be channeled into production of body fat.
C)  Excess acetyl-CoA will undergo beta-oxidation to produce body fat.
D)  Excess acetyl-CoA will undergo deamination to produce body fat.E) None of the above
F) A) and B)

Question 14

If ATP synthase had a mutation in the F1 complex portion of the protein,which of the following functions is most likely to be affected?

Accepted Answer

A)  rotation of the rotor
B)  flow of protons through the channel
C)  conversion of ADP and Pi to ATP
D)  insertion of the enzyme into the membraneE) B) and D)
F) B) and C)

Question 15

A process common to all living organisms,aerobic and anaerobic,is

Accepted Answer

A)  glycolysis.
B)  fermentation.
C)  the Krebs cycle.
D)  electron transport chain reactions.
E)  pyruvate oxidation.F) B) and D)
G) C) and D)

Question 16

Beta oxidation of these molecules converts them into acetyl-CoA,which can then enter the Krebs cycle for energy derivation.These are

Accepted Answer

A)  fatty acids.
B)  amino acids.
C)  ATP.
D)  nucleic acids.
E)  sugars.F) B) and D)
G) A) and B)

Question 17

Cells release energy from molecules such as glucose in a process very similar to inhalation of air and exhalation of carbon dioxide by humans.This process is known as cellular

Accepted Answer

A)  oxidation.
B)  reduction.
C)  photosynthesis.
D)  radiation.
E)  respiration.F) B) and D)
G) A) and C)

Question 18

The decarboxylation of pyruvate produces all of the following except

Accepted Answer

A)  NADH.
B)  acetyl-CoA.
C)  CO2.
D)  ATP.E) A) and B)
F) B) and C)

Question 19

When oxygen is limiting,during heavy exercise,muscle cells revert to ________________ fermentation for energy production.

Accepted Answer

A)  alcohol
B)  yeast
C)  aerobic
D)  lactic acidE) A) and B)
F) None of the above

Question 20

In which of the following steps of glycolysis are two ATP molecules are required?

Accepted Answer

A)  cleavage and rearrangement
B)  glucose priming
C)  oxidation
D)  pyruvate formation
E)  acetyl-CoA formationF) B) and D)
G) C) and D)

Exam 7: How Cells Harvest Energy

In muscle cells,fermentation produces not alcohol but

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Beta oxidation of these molecules converts them into acetyl-CoA,which can then enter the Krebs cycle for energy derivation.These are

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A molecule that stores energy by linking charged phosphate groups near each other is called

Correct AnswerverifiedShow Answer

In glycolysis,a major portion of the energy remains in the final product,which is called ________.

Correct AnswerverifiedShow Answer

A process common to all living organisms,aerobic and anaerobic,is

Correct AnswerverifiedShow Answer

The decarboxylation of pyruvate produces all of the following except

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In which of the following steps of glycolysis are two ATP molecules are required?

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If ATP synthase had a mutation in the F1 complex portion of the protein,which of the following functions is most likely to be affected?

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Fats undergo a process called ________ oxidation,in which the products are acetyl coenzyme molecules.

Correct AnswerverifiedShow Answer

An electron carrier that is used in harvesting energy from glucose molecules in a series of gradual steps in the cytoplasm is

Correct AnswerverifiedShow Answer

In order to lose weight and reduce body fat,a friend of yours decided to eliminate all fat from their diet,while consuming unrestricted amounts of carbohydrates.Aside from being an unhealthy way to try to lose weight,why would this approach be unsuccessful at reducing body fat?

Correct AnswerverifiedShow Answer

In eukaryotes,the glycolytic reactions take place in the

Correct AnswerverifiedShow Answer

You are examining some live cells in a Petri dish,when you begin to imagine what you would do if suddenly one of them were to burst into flames.Of course,in order for this to happen the cell would have to

Correct AnswerverifiedShow Answer

The enzymes catalyzing the reactions of glycolysis are found in the

Correct AnswerverifiedShow Answer

High levels of citrate in the cell would result in which of the following?

Correct AnswerverifiedShow Answer

Out of the total amount of free energy potentially available from total oxidation of glucose,the number of ATP made by cells is equal to an energy efficiency of about

Correct AnswerverifiedShow Answer

Simple molecules are further broken down in cells in a process called _________,during which energy stored in their chemical bonds is used to power the production of ATP.

Correct AnswerverifiedShow Answer

Coenzyme electron carrier;associated with Krebs cycle only.

Correct AnswerverifiedShow Answer

When oxygen is limiting,during heavy exercise,muscle cells revert to ________________ fermentation for energy production.

Correct AnswerverifiedShow Answer

Cells release energy from molecules such as glucose in a process very similar to inhalation of air and exhalation of carbon dioxide by humans.This process is known as cellular

Correct AnswerverifiedShow Answer

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If ATP synthase had a mutation in the F₁ complex portion of the protein,which of the following functions is most likely to be affected?

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