during the energy extraction part of the Krebs Cycle, how many molecules of CO2 are released?

Question

What is teh energy tally from 1 molecule of pyruvic acid during the Krebs cycle?

Answer 1

One CO2 is released during the conversion of pyruvate into Acetyl-Coenzyme A, and the the Krebs cycle itself releases two more CO2s.

That first reaction produced 1 NADH. Within the Krebs cycle itself, 1 FADH2 and 3 more NADH are produced. Additionally, one reaction in the cycle produces an ATP (or GTP) molecule.