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

question 4

Multiple Choice

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

• A) 1, 2, and 3
• B) 1, 2, and 4
• C) 1, 2, and 5
• D) 1, 4, and 4
• E) 2, 4, and 5

---

Definitions:

Over-the-Counter Medication

Drugs available for purchase without a prescription, used to treat common or minor ailments.

Heartburn

A burning discomfort or pain in the chest, usually arising from the reflux of stomach acid into the esophagus.

Avoidance Learning

A process of operant conditioning where learning occurs through the avoidance of an unpleasant stimulus.

Classical Conditioning

The acquisition of knowledge that takes place by associating an external stimulus with a naturally existing stimulus, which triggers a deliberate response.