Question 1

___________ combines with the two carbons of acetyl CoA,as it enters the Krebs cycle.

Accepted Answer

A)   Pyruvate
B)   Oxygen
C)   Oxaloacetate
D)   NADH
E)   A cytochromeF) B) and D)
G) All of the above

Question 2

In a eukaryotic cell,the Krebs cycle occurs in the

Accepted Answer

A)   lysosome.
B)   nucleus.
C)   mitochondria.
D)   cytoplasm.
E)   ribosome.F) B) and D)
G) All of the above

Question 3

Glycolysis occurs in the

Accepted Answer

A)   cytoplasm.
B)   cell membrane.
C)   mitochondria.
D)   nucleus.
E)   lysosome.F) B) and D)
G) A) and B)

Question 4

Figuer: 
-What is the dependent variable in this figure?

Accepted Answer

A)   temperature
B)   amount of pollen collected
C)   rate of carbon dioxide production
D)   glucose production
E)   rate of oxygen productionF) C) and E)
G) A) and B)

Question 5

Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain.

Accepted Answer

A) True 
 B)False

Question 6

ATP is needed for metabolism in all cells,because six ATPs are covalently bonded together to form glucose for energy.

Accepted Answer

A) True 
 B)False

Question 7

People beginning cardiopulmonary resuscitation (CPR)training are often surprised that they can breathe enough oxygen into a victim,with the air from their lungs.The fact that you still have sufficient oxygen to benefit another person in emergencies indicates that our bodies do not access and use all molecules of oxygen we breathe in.

Accepted Answer

A) True 
 B)False

Question 8

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)   excitation of electrons by sunlight
C)   release of electrons from water
D)   transfer of electrons to oxygen
E)   donation of electrons to the electron transport chainF) B) and D)
G) None of the above

Question 9

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)   ATP production would increase, because this would spontaneously establish a stronger proton gradient.
B)   ATP production would not change, because protons cross the outer mitochondrial membrane to produce ATP.
C)   ATP production would decrease, because protons would not be able to move across the inner mitochondrial membrane.
D)   ATP production would decrease, because electrons would not move through the electron transport chain and reduce oxygen.
E)   ATP production would increase, because this would make more oxygen available in the mitochondrial matrix.F) A) and C)
G) C) and D)

Question 10

Identify which of these places the steps of cellular aerobic respiration in the correct sequence.

Accepted Answer

A)   glycolysis - formation of Acetyl CoA - Krebs cycle - electron transport chain - ADP phosphorylation
B)   photosystem II - electron transport chain - photosystem I - carbon reactions
C)   glycolysis - electron transport chain - Krebs cycle - formation of Acetyl CoA - ADP phosphorylation
D)   None of these are correct, because they all fail to include the formation of glucose molecules.
E)   ADP phosphorylation - formation of Acetyl CoA - glycolysis - Krebs cycle - electron transport chainF) A) and B)
G) None of the above

Question 11

The enzyme that forms a transport channel in the inner membrane of the mitochondria and phosphorylates ADP is

Accepted Answer

A)   None of the answer choices are correct.
B)   NADH synthase.
C)   FADH2 synthase.
D)   ATP synthase.
E)   ADP synthase.F) B) and C)
G) A) and E)

Question 12

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

Accepted Answer

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

Question 13

The sole source of ATP production in cells using fermentation only is

Accepted Answer

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

Question 14

Figuer: 
-What did scientists conclude from the data shown in this figure?

Accepted Answer

A)   Active beetles saved energy at higher temperatures.
B)   Generating heat led to increased pollination of Philodendron flowers by beetles.
C)   Active beetles saved energy at lower temperatures.
D)   Resting beetles saved energy at lower temperatures.
E)   Resting beetles saved energy at higher temperatures.F) D) and E)
G) None of the above

Question 15

In eukaryotic cells,the electrons donated by NADH and FADH2 are transported along electron transport proteins in the

Accepted Answer

A)   cytoplasm.
B)   matrix.
C)   outer mitochondrial membrane.
D)   cell membrane.
E)   inner mitochondrial membrane.F) A) and D)
G) A) and C)

Question 16

Philodendron flowers pass electrons through an electron transport chain to generate heat.What is the source of these electrons?

Accepted Answer

A)   NADH and FADH2
B)   ATP
C)   sunlight
D)   oxygen
E)   waterF) All of the above
G) C) and D)

Question 17

The Krebs cycle produces

Accepted Answer

A)   ATP, NADH, and FADH2.
B)   carbon dioxide and oxygen.
C)   oxygen and ATP.
D)   NADH, FADH2, and oxygen.
E)   pyruvate and PGAL.F) A) and E)
G) A) and D)

Question 18

The chemical formula for glucose is:

Accepted Answer

A)   C12H6O12
B)   All of the answer choices are correct.
C)   C6H12O6
D)   C6H6O12
E)   C12H12O6F) B) and E)
G) B) and D)

Question 19

In glycolysis and the Krebs cycle,electrons are removed from glucose and taken up by molecules like NAD+.In such a reaction,glucose is being _____ and NAD+ is being ____.

Accepted Answer

A)   phosphorylated; reduced
B)   oxidized; reduced
C)   reduced; phosphorylated
D)   reduced; oxidized
E)   phosphorylated; oxidizedF) B) and E)
G) A) and B)

Question 20

In prokaryotic cells,metabolism through energy pathways

Accepted Answer

A)   can include either anaerobic respiration, or fermentation.
B)   takes place in the mitochondria.
C)   is replaced by fermentation in some organisms.
D)   is completed in the cytoplasm and the cell membrane.
E)   takes place in mitochondria and cytoplasm.F) C) and D)
G) A) and D)

Exam 6: How Cells Release Energy

Figuer: -What did scientists conclude from the data shown in this figure?

Correct Answer
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Identify which of these places the steps of cellular aerobic respiration in the correct sequence.

Correct Answer
verified

The chemical formula for glucose is:

Correct Answer
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Philodendron flowers pass electrons through an electron transport chain to generate heat.What is the source of these electrons?

Correct Answer
verified

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 Answer
verified

In prokaryotic cells,metabolism through energy pathways

Correct Answer
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Figuer: -What is the dependent variable in this figure?

Correct Answer
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Philodendron flowers pass electrons through a mitochondrial electron transport chain to generate heat.What step is bypassed in generating heat?

Correct Answer
verified

Correct Answer
verified

The sole source of ATP production in cells using fermentation only is

Correct Answer
verified

In eukaryotic cells,the electrons donated by NADH and FADH₂ are transported along electron transport proteins in the

Correct Answer
verified

Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain.

Correct Answer
verified

The enzyme that forms a transport channel in the inner membrane of the mitochondria and phosphorylates ADP is

Correct Answer
verified

In a eukaryotic cell,the Krebs cycle occurs in the

Correct Answer
verified

In glycolysis and the Krebs cycle,electrons are removed from glucose and taken up by molecules like NAD⁺.In such a reaction,glucose is being _ and NAD⁺ is being .

Correct Answer
verified

Glycolysis occurs in the

Correct Answer
verified

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

Correct Answer
verified

___________ combines with the two carbons of acetyl CoA,as it enters the Krebs cycle.

Correct Answer
verified

The Krebs cycle produces

Correct Answer
verified

ATP is needed for metabolism in all cells,because six ATPs are covalently bonded together to form glucose for energy.

Correct Answer
verified

Exam 6: How Cells Release Energy

Figuer: -What did scientists conclude from the data shown in this figure?

Correct AnswerverifiedShow Answer

Identify which of these places the steps of cellular aerobic respiration in the correct sequence.

Correct AnswerverifiedShow Answer

The chemical formula for glucose is:

Correct AnswerverifiedShow Answer

Philodendron flowers pass electrons through an electron transport chain to generate heat.What is the source of these electrons?

Correct AnswerverifiedShow Answer

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

In prokaryotic cells,metabolism through energy pathways

Correct AnswerverifiedShow Answer

Figuer: -What is the dependent variable in this figure?

Correct AnswerverifiedShow Answer

Philodendron flowers pass electrons through a mitochondrial electron transport chain to generate heat.What step is bypassed in generating heat?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The sole source of ATP production in cells using fermentation only is

Correct AnswerverifiedShow Answer

In eukaryotic cells,the electrons donated by NADH and FADH2 are transported along electron transport proteins in the

Correct AnswerverifiedShow Answer

Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain.

Correct AnswerverifiedShow Answer

The enzyme that forms a transport channel in the inner membrane of the mitochondria and phosphorylates ADP is

Correct AnswerverifiedShow Answer

In a eukaryotic cell,the Krebs cycle occurs in the

Correct AnswerverifiedShow Answer

In glycolysis and the Krebs cycle,electrons are removed from glucose and taken up by molecules like NAD+.In such a reaction,glucose is being _____ and NAD+ is being ____.

Correct AnswerverifiedShow Answer

Glycolysis occurs in the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

___________ combines with the two carbons of acetyl CoA,as it enters the Krebs cycle.

Correct AnswerverifiedShow Answer

The Krebs cycle produces

Correct AnswerverifiedShow Answer

ATP is needed for metabolism in all cells,because six ATPs are covalently bonded together to form glucose for energy.

Correct AnswerverifiedShow Answer

Correct Answer
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In eukaryotic cells,the electrons donated by NADH and FADH₂ are transported along electron transport proteins in the

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

In glycolysis and the Krebs cycle,electrons are removed from glucose and taken up by molecules like NAD⁺.In such a reaction,glucose is being _ and NAD⁺ is being .

Correct Answer
verified

Correct Answer
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