Exam 3

Question 1

Which of the following statements regarding fermentation is CORRECT?

a. The enzyme alcohol dehydrogenase regenerates NADH for glycolysis.

b. Glucose consumption is lower in anaerobic conditions (oxygen not present) in comparison to aerobic conditions (oxygen present).

c. Fermentation occurs more readily in aerobic conditions (oxygen present) than in anaerobic conditions (oxygen not present).

d. The lactate dehydrogenase reaction regenerates NAD+ for glycolysis.

Answer 1

d

Question 2

Where is the pyruvate dehydrogenase complex localized?

Answer 2

Mitochondia

Question 3

Consider the pyruvate dehydrogenase complex. When is carbon dioxide formed in the pyruvate dehydrogenase reaction mechanism?

Answer 3

E1 Reactions

Question 4

Which of the following is a product of the pyruvate dehydrogenase complex?

Answer 4

NADH

Question 5

How many reduced bonds does acetate have? In other words, how many reduced cofactors are formed when acetate is fully oxidized in the citric acid cycle?

Answer 5

4

Question 6

How many molecules of CO2 are formed in the citric acid cycle per acetyl-CoA?

Answer 6

2