Question 1

In the Investing Life,Hot Plants Offer Heat Rewards,scientists were working with heat production by flowers.What hypothesis were the scientists testing?

Accepted Answer

A)   Does generating heat increase the metabolism of Philodendron?
B)   Does generating heat decrease the metabolism of Philodendron?
C)   Is heat being used by Philodendron to attract pollinators?
D)   Is heat being used by Philodendron to increase the rate of pollen production?
E)   Does heat increase the rate of photosynthesis by Philodendron?F) A) and C)
G) None of the above

Question 2

During glycolysis and the Krebs cycle,NAD⁺ picks up two electrons and a proton to form NADH.The NADH molecule is the ________ form of NAD+.

Accepted Answer

A)   oxidized
B)   phosphorylated
C)   reduced
D)   hydrolyzed
E)   lysedF) C) and D)
G) None of the above

Question 3

In the electron transport chain,which structure forms a channel in the inner membrane of the mitochondria and adds phosphate to ADP?

Accepted Answer

A)   ATP synthase
B)   NADH synthase
C)   FADH₂ synthase
D)   ADP synthase
E)   NADPH synthaseF) A) and D)
G) B) and C)

Question 4

Which of the following toxins would interfere with the electron transport chain by preventing the formation of a proton gradient?

Accepted Answer

A)   mercury
B)   arsenic
C)   cyanide
D)   DNP
E)   carbon monoxideF) B) and E)
G) C) and E)

Question 5

At the end of cellular respiration,the electrons are transferred to a final electron acceptor.  In aerobic cellular respiration,this molecule is

Accepted Answer

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

Question 6

In eukaryotic cells,the Krebs cycle occurs in the

Accepted Answer

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

Question 7

The chemical formula for glucose is

Accepted Answer

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

Question 8

In aerobic respiration,nitrogen gas can be used as the final electron acceptor.

Accepted Answer

A) True 
 B)False

Question 9

The theoretical net ATP yield from a molecule of glucose is ________ ATP molecules.

Accepted Answer

A)   2
B)   36
C)   4
D)   15
E)   42F) C) and D)
G) B) and E)

Question 10

Energy cannot be extracted from lipids by cellular respiration.

Accepted Answer

A) True 
 B)False

Question 11

Many toxins are known to kill organisms by interfering with cellular respiration.Which poison blocks the Krebs cycle by inhibiting the formation of acetyl-coA?

Accepted Answer

A)   arsenic.
B)   carbon monoxide.
C)   cyanide.
D)   mercury compounds.
E)   DNP.F) A) and B)
G) C) and E)

Question 12

The Krebs cycle can be used to manufacture amino acids.

Accepted Answer

A) True 
 B)False

Question 13

Glycolysis and the Krebs cycle do not capture all of the potential 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) C) and D)
G) C) and E)

Question 14

All diet pills are approved by the U.S.Food and Drug Administration (FDA).

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A)   cytosol.
B)   mitochondrion.
C)   lysosome.
D)   nucleus.
E)   cell membrane.F) C) and D)
G) A) and E)

Question 16

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 B)
G) A) and E)

Question 17

In glycolysis,the net number of NADH produced is

Accepted Answer

A)   0.
B)   3.
C)   2.
D)   4.
E)   30.F) A) and D)
G) A) and E)

Question 18

If glucose is unavailable,aerobic respiration may occur with

Accepted Answer

A)   proteins.
B)   carbohydrates.
C)   fats.
D)   glycogen.
E)   All of the answer choices are correct.F) B) and E)
G) D) and E)

Question 19

Which energy pathway can be performed by all living organisms?

Accepted Answer

A)   aerobic respiration
B)   carbon reactions
C)   photosynthesis
D)   Krebs cycle
E)   glycolysisF) A) and D)
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 D)
G) C) and E)

Exam 6: Respiration and Fermentation

In the electron transport chain,which structure forms a channel in the inner membrane of the mitochondria and adds phosphate to ADP?

Correct AnswerverifiedShow Answer

During glycolysis and the Krebs cycle,NAD⁺ picks up two electrons and a proton to form NADH.The NADH molecule is the ________ form of NAD+.

Correct AnswerverifiedShow Answer

Many toxins are known to kill organisms by interfering with cellular respiration.Which poison blocks the Krebs cycle by inhibiting the formation of acetyl-coA?

Correct AnswerverifiedShow Answer

At the end of cellular respiration,the electrons are transferred to a final electron acceptor. In aerobic cellular respiration,this molecule is

Correct AnswerverifiedShow Answer

In glycolysis,the net number of NADH produced is

Correct AnswerverifiedShow Answer

The Krebs cycle can be used to manufacture amino acids.

Correct AnswerverifiedShow Answer

Which energy pathway can be performed by all living organisms?

Correct AnswerverifiedShow Answer

Energy cannot be extracted from lipids by cellular respiration.

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

Plants are

Correct AnswerverifiedShow Answer

In the Investing Life,Hot Plants Offer Heat Rewards,scientists were working with heat production by flowers.What hypothesis were the scientists testing?

Correct AnswerverifiedShow Answer

In eukaryotic cells,the Krebs cycle occurs in the

Correct AnswerverifiedShow Answer

The theoretical net ATP yield from a molecule of glucose is ________ ATP molecules.

Correct AnswerverifiedShow Answer

All diet pills are approved by the U.S.Food and Drug Administration (FDA).

Correct AnswerverifiedShow Answer

In aerobic respiration,nitrogen gas can be used as the final electron acceptor.

Correct AnswerverifiedShow Answer

If glucose is unavailable,aerobic respiration may occur with

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The chemical formula for glucose is

Correct AnswerverifiedShow Answer

Which of the following toxins would interfere with the electron transport chain by preventing the formation of a proton gradient?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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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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