Which three of the choices listed are possible sources for acetyl-CoA that enters the citric acid cycle?
1. oxidative decarboxylation of pyruvate
2. β oxidation of fatty acids
3. catabolism of certain amino acids
4. citrate
5. carboxylation of pyruvate

Question

Which three of the choices listed are possible sources for acetyl-CoA that enters the citric acid cycle? 
1. oxidative decarboxylation of pyruvate
2. β oxidation of fatty acids
3. catabolism of certain amino acids
4. citrate
5. carboxylation of pyruvate

Quizplus · Accepted Answer

1. Oxidative decarboxylation of pyruvate during aerobic respiration results in the formation of acetyl-CoA, which can then enter the citric acid cycle.
2. β oxidation of fatty acids also generates acetyl-CoA, which can then be used in the citric acid cycle for energy production.
3. Catabolism of certain amino acids, such as leucine, lysine, and isoleucine, can result in the formation of acetyl-CoA, which is used in the citric acid cycle.

Which Three of the Choices Listed Are Possible Sources for Acetyl-CoA