For every acetyl-CoA molecule that enters the citric acid cycle,________ molecules of ATP ultimately result when both the ATP generated directly by the cycle and ATP generated from oxidative phosphorylation of NAD and FADH₂ are counted.

Question

Quizplus · Accepted Answer

Each acetyl-CoA produces 3 NADH, 1 FADH2, and 1 GTP (or ATP) in the citric acid cycle. NADH and FADH2 are used in oxidative phosphorylation to produce ATP. Each NADH yields about 2.5 ATP, and each FADH2 yields about 1.5 ATP. Therefore, 3 NADH produce 7.5 ATP, 1 FADH2 produces 1.5 ATP, and 1 GTP is equivalent to 1 ATP, totaling approximately 12 ATP per acetyl-CoA.

For Every Acetyl-CoA Molecule That Enters the Citric Acid Cycle,________