Acetyl-CoA is produced from.....?

Question

a pyruvate and a coenzyme

b citric acid and a coenzyme

c ATP and a pyruvate

d CO2 and a pyruvate

e citric acid and CO2

Answer 1

Acetyl-CoA is produced when pyruvate loses a carboxyl group. The H of the carboxyl group is picked up by NAD, which becomes NADH. NADH will carry the hydrogen to the electron transport system. CO2 is then released as a waste product eliminated from the cell by the blood. Acetyl-CoA is produced when this carboxyl group is lost from the pyruvate, which is now an acetyl group. The acetyl group is then complexed with coenzyme A, which takes it to the Kreb's cycle enzymes. So, the closest answer is answer "A"

Answer 2

A

Answer 3

the best answer is a  however the actual reaction in the mitochondrion is pyruvate ___________ acetyl CoA by oxidative devarboxylation using the ENZYME pyruvate dehydrogenase and the co-enzyme NAD+   the oxidizing power is supplied by the NAD+, true..PDH lowers the energy of activation to allow the coenzyme to oxidize the pyruvate  and produce acetyl CoA with loss of CO2.

Answer 4

A is correct.