Energy Release and Conservation – Section 1

21. For each pair of electrons passing from NADH located inside the mitochondria to oxygen, how many ATP molecules can be generated?

A. 1
B. 2
C. 3
D. 4

Correct Answer: C. 3

22. In anaerobic respiration, the final electron acceptor can be

A. oxygen
B. nitrate
C. pyruvate
D. acetyl-CoA

Correct Answer: B. nitrate

23. Which one of the following is not produced in any of the steps of glycolysis?

A. NAD+
B. NADH
C. ADP
D. ATP

Correct Answer: A. NAD+

24. The number of ATP molecules produced from one glucose molecule by a bacterium producing lactic acid is

A. greater than producing ethanol
B. lesser than producing ethanol
C. approximately equal to producing ethanol
D. none of these

Correct Answer: C. approximately equal to producing ethanol

25. Which of the following is the most complete definition of fermentation?

A. Oxidation of glucose with organic molecules serving as electron acceptors
B. Complete catabolism of glucose to CO2 and HO2
C. Production of energy by substrate-level phosphorylation
D. Production of ethyl alcohol from glucose

Correct Answer: A. Oxidation of glucose with organic molecules serving as electron acceptors

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