Fatty acids enter the cell respiration pathway at
A. the citric acid cycle, once they have been converted to acetyl CoA.
B. glycolysis, once they have been converted to glucose.
C. electron transport chain, once they have been converted to NADH.
D. the intermediate stage, once they have been converted to pyruvate.
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Question 2) Diseases of the respiratory or circulatory systems that impair oxygen delivery to body cells will diminish ATP production in those cells.
Indicate whether this statement is true or false.
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Question 3) At rest, muscle tissue prefers to use _________ molecules as sources of fuel.
A. pyruvate
B. fatty acid
C. insulin
D. protein
E. simple carbohydrate
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Question 4) If oxygen levels drop such that glucose metabolism becomes primarily anaerobic, then the amount of ATP produced per glucose molecule will
A. increase slightly.
B. remain roughly the same.
C. be halved.
D. decrease to much less than half of what it was.
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Question 5) The reaction by which lactate is formed from pyruvate is catalyzed by lactate __________.
Fill in the blank with correct word.
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Question 6) If oxygen is in short supply, the activity of the electron transport chain increases in order to compensate.
Indicate whether this statement is true or false.
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Question 7) During electron transport, how many ATP can be generated from the energy contributed by a molecule of NADH?
A. 1
B. 2
C. 3
D. 30
E. 36
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Question 8) The total number of ATP generated by the breakdown of glucose is 38, but the net number of ATP generated is
A. 2.
B. 24.
C. 30.
D. 36.
E. 40.
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Question 9) When oxygen is low, pyruvate is converted to lactate, while
A. NADH is converted to NAD+.
B. ATP is converted to AMP.
C. citrate is converted to pyruvate.
D. FADH is converted to NADH.
E. FADH2 is reduced to FAD+.
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Question 10) The net ATP available for a cell to use after glycolysis of one glucose molecule is _____.
Fill in the blank with correct word.
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