Bio 110 Final: Chapter 7

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Quiz on Bio 110 Final: Chapter 7, created by Christina Marshall on 13/12/2017.
Christina Marshall
Quiz by Christina Marshall, updated more than 1 year ago
Christina Marshall
Created by Christina Marshall almost 7 years ago
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Resource summary

Question 1

Question
Which of the following pathways occurs in the cytosol?
Answer
  • Glycolysis
  • Breakdown of pyruvate to an acetyl group
  • citric acid cycle
  • oxidative phosphorylation
  • all of the above

Question 2

Question
The net products of glycolysis are
Answer
  • 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

Question 3

Question
During glycolysis, ATP is produced by
Answer
  • oxidative phosphorylation
  • substrate level phosphorylation
  • redox reactions
  • all of the above
  • both a and b

Question 4

Question
Which organic molecule supplies a two-carbon group to start the citric acid cycle?
Answer
  • ATP
  • NADH
  • acetyl CoA
  • oxaloacetate
  • both a and b

Question 5

Question
The ability to diagnose tumors using [18F]-fluorodeoxyglucose (FDG) is based on the phenomenon that most types of cancer cells exhibit higher levels of
Answer
  • glycolysis
  • pyruvate breakdown
  • citric acid metabolism
  • oxidative phosphorylation
  • all of the above

Question 6

Question
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?
Answer
  • 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

Question 7

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

Question 8

Question
The source of energy that directly drives the synthesis of ATP during oxidative phosphorylation is the
Answer
  • oxidation of NADH
  • oxidation of glucose
  • oxidation of pyruvate
  • H+ gradient
  • reduction of O2

Question 9

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

Question 10

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