Question

How many ATP equivalents are produced from the oxidation of 3 acetyl-CoAs? Hint: There are 2.5 ATP produced when two electrons are transferred from NADH to oxygen by the electron transport chain, and 1.5 ATP are produced when two electrons are transferred from FADH2 to oxygen by the electron transport chain.

Answer 1

1 acetyl coA enters TCA to give -

1 GTP ( 1 ATP)

3 NADH (3 × 2.5 = 7.5 ATP)

1 FADH₂ (1 × 1.5 = 1.5 ATP)

TOTAL # ATP = 1 + 7.5 + 1.5 = 10 ATP

1 acetyl coA = 10 ATP

3 acetyl coA = 3 × 10 = 30 ATP (answer)

Acetyl coA is oxidized into carbon dioxide and water to produce ATP and coenzymes in mitochondrial matrix during citric acid cycle.

Please rate high.