Question

1) How many CO2 molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of glyceraldehydes-3-phosphate that goes through glycolysis, pyruvate dehydrogenase, and the TCA cycle?
a.1
b.2
c.3
d.4
e.5
f.6

How many NADPH molecules are produced by pyruvate dehydrogenase and the TCA cycle per molecule of phosphoenolpyruvate that goes through glycolysis, pyruvate dehydrogenase, and the TCA cycle?

a.3
b.4
c.6
d.8
e.0

Answer 1

1) F, 6 Molecules of CO₂ are produced in total burning of glucose in glycolysis and TCA.

• 2 CO₂ are released (1 per pyruvate)
• 4 CO₂'s are released (2 per Acetyl CoA that enters)

2) D, 8 molecules of NADH2 are produced

• 2 NADH's are generated (1 per pyruvate)
• 6 NADH's are generated (3 per Acetyl CoA that enters)