Question

The number of ATP molecules formed from complete oxidation of acetyl CoA is:

• A. 12 ATP
• B. 16 ATP
• C. 18 ATP
• D. 38 ATP

Answer 1

Answer:

A. 12 ATP

The complete oxidation of one molecule of acetyl CoA produces 12 ATP molecules. This is because: Glucose undergoes glycolysis to produce two pyruvate molecules The pyruvate molecules are converted to two acetyl CoA molecules Each acetyl CoA molecule enters the citric acid cycle, also known as the Krebs cycle The citric acid cycle produces 3 NADH2 (9 ATP), 1 FADH2 (2 ATP), and 1 GTP (1 ATP)