Question 1

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 C)
G) C) and E)

Question 2

When NAD+ picks up two electrons and a proton in reactions of the Krebs cycle to form NADH,the NAD+ is

Accepted Answer

A)  oxidized.
B)  phosphorylated.
C)  reduced.
D)  hydrolyzeD.
E)  lysed.F) D) and E)
G) C) and E)

Question 3

The net ATP production in glycolysis is only two because

Accepted Answer

A)  two molecules of ATP are needed to "activate" glucose.
B)  two molecules of ATP are used to move glucose into the chloroplast.
C)  glycolysis is the final step of aerobic respiration.
D)  ATP production cannot exceed NADH production.
E)  glycolysis may occur without oxygen being present.F) A) and B)
G) A) and C)

Question 4

What did scientists conclude about beetles and self-heating flowers?

Accepted Answer

A)  At higher temperatures resting beetles saved energy.
B)  At higher temperatures active beetles saved energy.
C)  At lower temperatures active beetles saved energy.
D)  At lower temperatures resting beetles saved energy.
E)  Generating heat led to increased pollination of Philodendron flowers by beetles.F) A) and B)
G) B) and D)

Question 5

The electrons that are transferred during cellular respiration are carried in the molecules

Accepted Answer

A)  NADP and FADH2.
B)  NADH and FADH2.
C)  carbon dioxide.
D)  NADH2 and glucose.
E)  acetyl CoA.F) A) and E)
G) B) and D)

Question 6

Muscle cells use lactic acid fermentation to

Accepted Answer

A)  regenerate NAD+ so that glycolysis can continue in the absence of oxygen.
B)  produce ATP in the presence of oxygen.
C)  produce more ATP than in respiration.
D)  allow an animal to survive for long periods of time in the absence of oxygen.
E)  produce less CO2.F) C) and D)
G) A) and D)

Question 7

If glucose is unavailable,aerobic respiration may occur with

Accepted Answer

A)  All answers are correct.
B)  proteins.
C)  carbohydrates,including starch and glycogen.
D)  fats.E) A) and B)
F) C) and D)

Question 8

The compound that enters the Krebs cycle is

Accepted Answer

A)  ATP.
B)  pyruvate.
C)  PGAL.
D)  ATP synthase.
E)  acetyl CoA.F) C) and D)
G) B) and E)

Question 9

In glycolysis,the net number of NADH produced is

Accepted Answer

A)  0.
B)  3.
C)  2.
D)  4.
E)  30.F) All of the above
G) D) and E)

Question 10

Which energy pathway connects all living organisms?

Accepted Answer

A)  Aerobic respiration
B)  Carbon reactions
C)  Photosynthesis
D)  Krebs cycle
E)  GlycolysisF) C) and E)
G) All of the above

Question 11

Fermentation is most common in

Accepted Answer

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

Question 12

The area enclosed by the highly folded inner mitochondrial membrane is the

Accepted Answer

A)  cytoplasm.
B)  nucleus.
C)  outer membrane.
D)  intermembrane compartment.
E)  matrix.F) A) and B)
G) B) and E)

Question 13

The chemical formula for glucose is

Accepted Answer

A)  C6H12O6.
B)  C12H6O12.
C)  C6H6O12.
D)  C12H12O6.
E)  C1H2O1.F) B) and D)
G) C) and E)

Question 14

The electron transport chain produces a(n) _____________ gradient.

Accepted Answer

A)  electron
B)  ATP
C)  NADH
D)  oxygen
E)  protonF) None of the above
G) A) and E)

Question 15

Glycolysis and the Krebs cycle do not capture all of the energy in a glucose molecule because

Accepted Answer

A)  ATP easily vaporizes.
B)  energy cannot be created or destroyed.
C)  some glucose is not broken down.
D)  some energy is always lost as heat during chemical reactions.
E)  All answers are correct.F) B) and E)
G) B) and D)

Question 16

If asked to point on a diagram of a cell to the place where glycolysis occurs,you would plant to the

Accepted Answer

A)  cytoplasm.
B)  mitochondrion.
C)  lysosome.
D)  nucleus.
E)  cell membranE.F) A) and B)
G) A) and C)

Question 17

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)  reduced,oxidized
B)  oxidized,reduced
C)  phosphorylated,oxidized
D)  phosphorylated,reduced
E)  reduced,phosphorylatedF) A) and D)
G) All of the above

Question 18

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

Accepted Answer

A)  water
B)  oxygen
C)  ATP
D)  sunlight
E)  NADH and FADH2F) A) and E)
G) A) and D)

Question 19

Unlike animals,plants perform cellular respiration in their chloroplasts.

Accepted Answer

A) True 
 B)False

Question 20

The Krebs cycle occurs in the

Accepted Answer

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

Exam 6: How Cells Release Energy

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

In glycolysis,the net number of NADH produced is

Correct AnswerverifiedShow Answer

If glucose is unavailable,aerobic respiration may occur with

Correct AnswerverifiedShow Answer

Muscle cells use lactic acid fermentation to

Correct AnswerverifiedShow Answer

Glycolysis and the Krebs cycle do not capture all of the energy in a glucose molecule because

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

The area enclosed by the highly folded inner mitochondrial membrane is the

Correct AnswerverifiedShow Answer

If asked to point on a diagram of a cell to the place where glycolysis occurs,you would plant to the

Correct AnswerverifiedShow Answer

Unlike animals,plants perform cellular respiration in their chloroplasts.

Correct AnswerverifiedShow Answer

Which energy pathway connects all living organisms?

Correct AnswerverifiedShow Answer

What did scientists conclude about beetles and self-heating flowers?

Correct AnswerverifiedShow Answer

The electron transport chain produces a(n) _____________ gradient.

Correct AnswerverifiedShow Answer

The Krebs cycle occurs in the

Correct AnswerverifiedShow Answer

The electrons that are transferred during cellular respiration are carried in the molecules

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

The compound that enters the Krebs cycle is

Correct AnswerverifiedShow Answer

When NAD+ picks up two electrons and a proton in reactions of the Krebs cycle to form NADH,the NAD+ is

Correct AnswerverifiedShow Answer

The net ATP production in glycolysis is only two because

Correct AnswerverifiedShow Answer

The chemical formula for glucose is

Correct AnswerverifiedShow Answer

Fermentation is most common in

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 Answer
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When NAD⁺ picks up two electrons and a proton in reactions of the Krebs cycle to form NADH,the NAD⁺ is

Correct Answer
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