Question 1

What must pyruvate be converted into before it can enter the citric acid cycle?

Accepted Answer

A)   lactic acid
B)   ethyl alcohol
C)   acetyl CoA
D)   citric acid
E)   pyruvateF) B) and E)
G) B) and D)

Question 2

The products of fermentation of bacteria can be used to produce

Accepted Answer

A)   lactose used in making yogurt.
B)   lactic acid used in making beer.
C)   lactic acid used in making bread.
D)   lactose used in making beer.
E)   lactose used in making wine.F) B) and E)
G) None of the above

Question 3

Why is it necessary for ATP to be used in the energy-investment phase of glycolysis?

Accepted Answer

A)   Adding the phosphate to the glucose molecule allows the later reactions that take place in the energy payoff phase to occur.
B)   Adding the phosphate to the glucose molecule breaks it into pyruvate.
C)   There is no purpose to adding the phosphate to the glucose; it just happens that way.
D)   When ATP is broken into adenosine, triglycerides, and phosphate, it supplies energy to produce more ATP later in oxidative phosphorylation.
E)   The energy released when ATP becomes ADP is harnessed and used to pump hydrogen ions across the mitochondrial membrane.F) A) and B)
G) A) and C)

Question 4

Calories are contained in sugars and fats but not in artificial sweeteners like NutraSweet.What are possible reasons that NutraSweet does not contain calories?

Accepted Answer

A)   We lack enzymes to break the bonds.
B)   The sweetness is from chemicals other than sugars.
C)   The sugars are more easily broken and converted to energy.
D)   The calories are lost as heat.
E)   We lack enzymes to break the bonds and the sweetness is from chemicals other than sugars.F) A) and B)
G) B) and E)

Question 5

Which process is used to make bread rise?

Accepted Answer

A)   lactic acid fermentation
B)   glycolysis
C)   alcoholic fermentation
D)   the Krebs cycle
E)   cellular respirationF) D) and E)
G) B) and E)

Question 6

The functioning of an electron transport chain is analogous to

Accepted Answer

A)   playing tennis.
B)   a rock falling from a cliff.
C)   a person jumping from the top to the bottom of a flight of stairs in one jump.
D)   a person descending a flight of stairs one step at a time.
E)   a person jumping rope.F) A) and B)
G) B) and C)

Question 7

Where in the cell does glycolysis occur?

Accepted Answer

A)   cytoplasm
B)   mitochondrion
C)   matrix of mitochondrion
D)   cristae of mitochondrionE) A) and C)
F) All of the above

Question 8

Fermentation occurs if

Accepted Answer

A)   glucose is not present.
B)   excess ATP is present.
C)   oxygen is not present.
D)   carbon dioxide is present.
E)   carbon dioxide is not present.F) A) and B)
G) B) and E)

Question 9

As a result of glycolysis there is a NET gain of _______ ATPs.

Accepted Answer

A)   0
B)   2
C)   4
D)   36
E)   12F) A) and E)
G) B) and D)

Question 10

A product of glycolysis is

Accepted Answer

A)   ethyl alcohol.
B)   lactic acid.
C)   pyruvate.
D)   oxygen.
E)   acetyl CoA.F) B) and E)
G) A) and B)

Question 11

What will occur if oxygen is not available in great enough quantity during cellular respiration?

Accepted Answer

A)   Cellular respiration will shift towards anaerobic respiration.
B)   The number of ATP produced will increase.
C)   Oxygen will start to diffuse at a greater rate in order to make up for the deficiency.
D)   Nothing will change since oxygen is not required for cellular respiration.
E)   CO2 will not be able to fix itself to the Calvin cycle.F) None of the above
G) B) and D)

Question 12

Cellular respiration uses oxygen to convert the chemical energy stored in organic molecules into

Accepted Answer

A)   energy in other organic molecules.
B)   energy in ATP.
C)   energy in carbon dioxide.
D)   water.
E)   pyruvate.F) D) and E)
G) A) and E)

Question 13

Susan suffered from a heart attack.When the doctors tested the heart muscle they found that she had an increased ratio of lactic acid to pyruvic acid in her heart.What does this say about the availability of oxygen in her heart muscle cells?

Accepted Answer

A)   The heart cells must have received too much oxygen.
B)   The heart cells had not received adequate oxygen supply.
C)   The heart cells had a build up of carbon dioxide, poisoning her cells.
D)   The lactic acid built up as a result of cellular respiration occurring at too fast of a rate.
E)   The heart cells had too much carbon dioxide build up.F) A) and B)
G) C) and E)

Question 14

What would happen if NAD+ were not available for cellular respiration?

Accepted Answer

A)   There would be a slight reduction in the number of ATP formed.
B)   There would be a great reduction in the number of ATP formed.
C)   There would be no effect on the number of ATP formed.
D)   Cellular respiration would not proceed.
E)   There would be an increase in ATP produced.F) B) and E)
G) A) and B)

Question 15

Your friend has been on a diet and loses 15 pounds of fat.After studying cellular respiration how can you explain the weight loss,where did the weight go (how was it lost) ?

Accepted Answer

A)   It was released as carbon dioxide and water.
B)   It was converted to ATP which weighs much less than fat.
C)   It was broken down into amino acids and eliminated from the body.
D)   It was converted to urine and eliminated from the body.
E)   It was released as oxygen and water.F) A) and D)
G) C) and D)

Question 16

The enzyme that converts pyruvic acid into acetyl CoA requires vitamin B1,also called thiamine.Vitamin B1 has to be taken in through the diet of an individual.At what phase would cellular respiration come to a halt without B1?

Accepted Answer

A)   glycolysis
B)   preparatory reaction
C)   citric acid cycle
D)   electron transport chainE) B) and C)
F) B) and D)

Question 17

You have decided to try to make your own wine by adding yeast to a sweet grape juice.After allowing plenty of time for the yeast to grow,you find that although the sugar levels in the juice are decreased,there is no alcohol in the mixture.What could have been the reason fermentation did not occur?

Accepted Answer

A)   More sugar needs to be added, yeast need a lot of energy before they produce alcohol.
B)   Less sugar is needed in the juice, high sugar concentration causes cellular respiration to occur instead of fermentation.
C)   Yeast can not ferment grapes, only bacteria can.
D)   The mixture needs less oxygen, yeast only produce alcohol in the absence of oxygen.
E)   The mixture needs more carbon dioxide.F) All of the above
G) A) and B)

Question 18

What type(s) of organisms does cellular respiration occur in?

Accepted Answer

A)   autotrophs
B)   heterotrophs
C)   decomposers
D)   producers
E)   All answers given are correct.F) A) and B)
G) B) and E)

Question 19

On the cellular level what process uses oxygen to break food down,producing ATP?

Accepted Answer

A)   photosynthesis
B)   oxidation/reduction reactions
C)   cellular respiration
D)   mitosis
E)   meiosisF) B) and C)
G) A) and E)

Question 20

A new organism is discovered which contains a super enzyme that requires no ATP to split glucose into pyruvate but cannot function if oxygen is present.What is this organism's net production of ATP from one molecule of glucose?

Accepted Answer

A)   2
B)   4
C)   38
D)   40
E)   42F) D) and E)
G) B) and E)

Exam 7: Energy for Cells

The products of fermentation of bacteria can be used to produce

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What type(s) of organisms does cellular respiration occur in?

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Calories are contained in sugars and fats but not in artificial sweeteners like NutraSweet.What are possible reasons that NutraSweet does not contain calories?

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As a result of glycolysis there is a NET gain of _______ ATPs.

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Fermentation occurs if

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What must pyruvate be converted into before it can enter the citric acid cycle?

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A product of glycolysis is

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What would happen if NAD+ were not available for cellular respiration?

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What will occur if oxygen is not available in great enough quantity during cellular respiration?

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Your friend has been on a diet and loses 15 pounds of fat.After studying cellular respiration how can you explain the weight loss,where did the weight go (how was it lost) ?

Correct AnswerverifiedShow Answer

The functioning of an electron transport chain is analogous to

Correct AnswerverifiedShow Answer

Why is it necessary for ATP to be used in the energy-investment phase of glycolysis?

Correct AnswerverifiedShow Answer

A new organism is discovered which contains a super enzyme that requires no ATP to split glucose into pyruvate but cannot function if oxygen is present.What is this organism's net production of ATP from one molecule of glucose?

Correct AnswerverifiedShow Answer

The enzyme that converts pyruvic acid into acetyl CoA requires vitamin B1,also called thiamine.Vitamin B1 has to be taken in through the diet of an individual.At what phase would cellular respiration come to a halt without B1?

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On the cellular level what process uses oxygen to break food down,producing ATP?

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Which process is used to make bread rise?

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Cellular respiration uses oxygen to convert the chemical energy stored in organic molecules into

Correct AnswerverifiedShow Answer

Susan suffered from a heart attack.When the doctors tested the heart muscle they found that she had an increased ratio of lactic acid to pyruvic acid in her heart.What does this say about the availability of oxygen in her heart muscle cells?

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Where in the cell does glycolysis occur?

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You have decided to try to make your own wine by adding yeast to a sweet grape juice.After allowing plenty of time for the yeast to grow,you find that although the sugar levels in the juice are decreased,there is no alcohol in the mixture.What could have been the reason fermentation did not occur?

Correct AnswerverifiedShow Answer

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The enzyme that converts pyruvic acid into acetyl CoA requires vitamin B₁,also called thiamine.Vitamin B₁ has to be taken in through the diet of an individual.At what phase would cellular respiration come to a halt without B₁?

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