Question 1

If you put a plant in a chamber and place it in the dark,

Accepted Answer

A)  the concentration of O2 will increase and the concentration of CO2 will decrease.
B)  the concentration of O2 will decrease and the concentration of CO2 will increase.
C)  the concentrations of O2 and CO2 will decrease.
D)  the concentrations of O2 and CO2 will increase.E) All of the above
F) A) and B)

Question 2

Molecules called uncouplers allow protons to cross the inner mitochondrial membrane.What effect would this have on ATP production in the mitochondria?

Accepted Answer

A)  decreased ATP,because electrons would not be able to move through the electron transport chain
B)  decreased ATP,because protons would not be available to pass through the ATP synthase
C)  no effect,because protons cross the outer mitochondrial membrane to produce ATP
D)  increased ATP,because this would spontaneously establish a proton gradient
E)  increased ATP,because this would make more oxygen available in the mitochondrial matrixF) B) and C)
G) A) and E)

Question 3

What happens first to the carbon atoms that enter the Krebs cycle as acetyl CoA?

Accepted Answer

A)  They are reduced to form carbon dioxide.
B)  They combine with a 4-carbon sugar to form a 6-carbon sugar citrate.
C)  Two acetyl CoA molecules join together to form a 6-carbon sugar glucose.
D)  They combine with pyruvate to form a 4-carbon sugar malate.
E)  They are activated with a phosphate from ATP.F) C) and D)
G) A) and C)

Question 4

The electron transport chain produces a/an _____________ gradient.

Accepted Answer

A)  electron
B)  ATP
C)  NADH
D)  oxygen
E)  protonF) B) and E)
G) C) and D)

Question 5

During glycolysis,molecules of glucose are

Accepted Answer

A)  broken down into two molecules of carbon dioxide.
B)  combined to form two molecules of pyruvate.
C)  combined to form two molecules of carbon dioxide.
D)  broken down into two molecules of pyruvate.
E)  broken down into two molecules of oxygen.F) B) and D)
G) A) and B)

Question 6

The products of cellular respiration are

Accepted Answer

A)  carbon dioxide,glucose,and water.
B)  glucose,water,and ATP.
C)  glucose,carbon dioxide,and ATP.
D)  oxygen,ATP,and water.
E)  carbon dioxide,water,and ATP.F) A) and B)
G) B) and D)

Question 7

Which of the following molecules is the only molecule which will complete the full set of aerobic respiration stages?

Accepted Answer

A)  Carbohydrates,including glucose,starch,and glycogen
B)  Proteins
C)  Amino acids
D)  Fats
E)  Nucleic acidsF) A) and B)
G) A) and C)

Question 8

The "spent" electrons from the electron transport chain in aerobic respiration are transferred to

Accepted Answer

A)  oxygen.
B)  nitrogen.
C)  hydrogen.
D)  sulfur.
E)  carbon dioxidE.F) A) and B)
G) B) and D)

Question 9

______ ATP are produced per glucose molecule during fermentation,whereas ______ ATP are produced per molecule of glucose by aerobic respiration.

Accepted Answer

A)  30,2
B)  6,30
C)  2,30
D)  30,6
E)  2,6F) A) and B)
G) All of the above

Question 10

The Krebs cycle continues the breakdown of glucose and

Accepted Answer

A)  manufactures fats and amino acids.
B)  replicates DNA.
C)  provides oxygen to cells.
D)  manufactures carbohydrates.
E)  All choices are correct.F) B) and E)
G) C) and D)

Question 11

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",Philodendron flowers pass electrons through a mitochondrial electron transport chain to generate heat.What step is bypassed in generating heat?

Accepted Answer

A)  formation of a proton gradient
B)  transfer of electrons to oxygen
C)  donation of electrons to the electron transport chain
D)  excitation of electrons by sunlight
E)  release of electrons from waterF) B) and D)
G) D) and E)

Question 12

Fermentation uses an inorganic molecule as the electron acceptor at the end of the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 13

Cyanide and carbon monoxide block the final step in the electron transport chain.What effect would this have on ATP production in the mitochondria?

Accepted Answer

A)  decreased ATP,because protons would not be able to move across the inner mitochondrial membrane
B)  no effect,because protons cross the outer mitochondrial membrane to produce ATP
C)  decreased ATP,because electrons would not be able to move through the electron transport chain
D)  increased ATP,because this would spontaneously establish a proton gradient
E)  increased ATP,because this would make more oxygen available in the mitochondrial matrixF) B) and E)
G) B) and D)

Question 14

Cellular aerobic respiration includes only the Krebs cycle and electron transport chain.

Accepted Answer

A) True 
 B)False

Question 15

In animal cells,the primary organelle that generates molecules of ATP is the

Accepted Answer

A)  ribosome.
B)  lysosome.
C)  Golgi body.
D)  None of the answers are correct.
E)  mitochondrion.F) A) and D)
G) A) and E)

Question 16

The chemical formula for glucose is ______.

Accepted Answer

A)  C6H12O6
B)  C12H6O12
C)  C6H6O12
D)  C12H12O6
E)  C1H2O1F) A) and B)
G) A) and C)

Question 17

Glycolysis of a glucose molecule

Accepted Answer

A)  produces a net gain of two molecules of ATP.
B)  occurs only in animal cells.
C)  transfers electrons from glucose to FAD.
D)  occurs only in microorganisms.
E)  occurs in mitochondria.F) All of the above
G) B) and E)

Question 18

The only source of ATP production in cells relying fermentation is

Accepted Answer

A)  glycolysis.
B)  the Krebs cycle.
C)  photosynthesis.
D)  electron transport.
E)  the Calvin cyclE.F) B) and D)
G) A) and B)

Question 19

Fermentation is most common in

Accepted Answer

A)  plants.
B)  animals.
C)  fungi.
D)  microbes.
E)  viruses.F) A) and B)
G) A) and E)

Question 20

Plants are

Accepted Answer

A)  net O2 consumers and CO2 producers.
B)  net O2 producers and CO2 consumers.
C)  net O2 and CO2 producers.
D)  net O2 and CO2 consumers.
E)  able to conduct photosynthesis,not cellular respiration.F) A) and B)
G) A) and C)

Exam 6: How Cells Release Energy

In the section "Investigating Life: Plants' Alternative Lifestyles Yield Hot Sex",Philodendron flowers pass electrons through a mitochondrial electron transport chain to generate heat.What step is bypassed in generating heat?

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The Krebs cycle continues the breakdown of glucose and

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Glycolysis of a glucose molecule

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The chemical formula for glucose is ______.

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Molecules called uncouplers allow protons to cross the inner mitochondrial membrane.What effect would this have on ATP production in the mitochondria?

Correct AnswerverifiedShow Answer

Cellular aerobic respiration includes only the Krebs cycle and electron transport chain.

Correct AnswerverifiedShow Answer

In animal cells,the primary organelle that generates molecules of ATP is the

Correct AnswerverifiedShow Answer

The "spent" electrons from the electron transport chain in aerobic respiration are transferred to

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The electron transport chain produces a/an _____________ gradient.

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______ ATP are produced per glucose molecule during fermentation,whereas ______ ATP are produced per molecule of glucose by aerobic respiration.

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Cyanide and carbon monoxide block the final step in the electron transport chain.What effect would this have on ATP production in the mitochondria?

Correct AnswerverifiedShow Answer

During glycolysis,molecules of glucose are

Correct AnswerverifiedShow Answer

What happens first to the carbon atoms that enter the Krebs cycle as acetyl CoA?

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Fermentation is most common in

Correct AnswerverifiedShow Answer

Fermentation uses an inorganic molecule as the electron acceptor at the end of the electron transport chain.

Correct AnswerverifiedShow Answer

The only source of ATP production in cells relying fermentation is

Correct AnswerverifiedShow Answer

If you put a plant in a chamber and place it in the dark,

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Plants are

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The products of cellular respiration are

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Which of the following molecules is the only molecule which will complete the full set of aerobic respiration stages?

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ATP are produced per glucose molecule during fermentation,whereas ATP are produced per molecule of glucose by aerobic respiration.

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