Christina Marshall
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Quiz on Bio 110 Final: Chapter 7, created by Christina Marshall on 13/12/2017.

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Christina Marshall
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Bio 110 Final: Chapter 7

Bio 110 Final: Chapter 7

Question 1 of 10

1

Which of the following pathways occurs in the cytosol?

Select one of the following:

  • Glycolysis

  • Breakdown of pyruvate to an acetyl group

  • citric acid cycle

  • oxidative phosphorylation

  • all of the above

Explanation

Question 2 of 10

1

The net products of glycolysis are

Select one of the following:

  • 6 CO2, 4 ATP, and 2 NADH

  • 2 Pyruvate, 2 ATP, 2 NADH

  • 2 pyruvate, 4 ATP, 2 NADH

  • 2 pyruvate, 2 GTP, 2 CO2

  • 2 CO2, 2 ATP, glucose

Explanation

Question 3 of 10

1

During glycolysis, ATP is produced by

Select one of the following:

  • oxidative phosphorylation

  • substrate level phosphorylation

  • redox reactions

  • all of the above

  • both a and b

Explanation

Question 4 of 10

1

Which organic molecule supplies a two-carbon group to start the citric acid cycle?

Select one of the following:

  • ATP

  • NADH

  • acetyl CoA

  • oxaloacetate

  • both a and b

Explanation

Question 5 of 10

1

The ability to diagnose tumors using [18F]-fluorodeoxyglucose (FDG) is based on the phenomenon that most types of cancer cells exhibit higher levels of

Select one of the following:

  • glycolysis

  • pyruvate breakdown

  • citric acid metabolism

  • oxidative phosphorylation

  • all of the above

Explanation

Question 6 of 10

1

In the experiment of Racker and Stoeckenius, bacteriorhodopsin was oriented in such a way that it pumped H+ into a vesicle. Each vesicle actually contained many molecules of bacteriorhodopsin. How would the results have been affected if 50% of the bacteriorhodopsin molecules pumped H+into the vesicle and 50% pumped H+ out of the vesicles?

Select one of the following:

  • The same amount fo ATP would be made in the presence of light, and no ATP would be made in the dark.

  • More ATP would be made in the presence of light, and no ATP would be made in the dark.

  • No ATP would be made in the presence of light, and no ATP would be made in the dark

  • No ATP would be made in the presence of light, but some ATP would be made in the dark.

  • Some ATP would be made in both light and dark

Explanation

Question 7 of 10

1

Certain drugs act as ionophores that cause the mitochondrial membrane to be highly permeable to H+. How would such drugs affect oxidative phosphorylation?

Select one of the following:

  • Movement of electrons down the ETC would be inhibited

  • ATP synthesis would be inhibited

  • ATP synthesis would be unaffected

  • ATP synthesis would be stimulated

  • Both a and b are correct

Explanation

Question 8 of 10

1

The source of energy that directly drives the synthesis of ATP during oxidative phosphorylation is the

Select one of the following:

  • oxidation of NADH

  • oxidation of glucose

  • oxidation of pyruvate

  • H+ gradient

  • reduction of O2

Explanation

Question 9 of 10

1

Compared with oxidative phosphorylation in mitochondria, a key difference of anaerobic respiration in bacteria is that

Select one of the following:

  • more ATP is made

  • ATP is made only via substrate-level phosphorylation

  • O2 is converted into H2O2 rather than H2O.

  • something other than O2 acts as the final electron acceptor of the ETC.

  • b and d

Explanation

Question 10 of 10

1

When muscle becomes anaerobic during strenuous exercise, why is it necessary to convert pyruvate to lactate?

Select one of the following:

  • to decrease NAD+ and increase NADH

  • to decrease NADH and increase NAD+

  • to increase NADH and increase NAD+

  • to decrease NADH and decrease NAD+

  • to keep oxidative phosphorylation running

Explanation

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