Question

1. How many CO2 molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of pyruvate?

a.) 1 b.) 2 c.) 3 d.) 4 e.) 6

2. How many NADH molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of pyruvate?

a.) 3 b.) 4 c.) 6 d.) 8 e.) 10 

Answer 1

The reaction of pyruvate dehydrogenase and the TCA cycle per molecule of pyruvate is as follows:

Pyruvate ion + 4 NAD+ + Q + GDP + Pi + 2 H2O

→ 4 NADH + 4 H+ + QH2 + GTP + 3 CO2

1. How many CO2 molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of pyruvate?

a.) 1 b.) 2 c.) 3 d.) 4 e.) 6

thus the correct answer is c.) 3

2. How many NADH molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of pyruvate?

a.) 3 b.) 4 c.) 6 d.) 8 e.) 10

thus the correct answer is b.) 4