Q8 / 200 · MHT CET - Medical 2026 (22 April Shift 1) · Biology
Which one of the following intermediate metabolites is common for aerobic break down of glucose, aminoacid and fatty acids?
- AGlucose-6-phosphate
- BFructose 1, 6 diphosphate
- CPyruvic acid
- Correct answerDAcetyl Co.A
Solution
Carbohydrates are broken down into glucose, which undergoes glycolysis to form pyruvic acid. Pyruvic acid is then oxidatively decarboxylated to form acetyl CoA.
Fats are broken down into fatty acids and glycerol. Fatty acids undergo $\beta$-oxidation to directly form acetyl CoA.
Proteins are degraded into amino acids, which after deamination can enter the respiratory pathway as pyruvate, acetyl CoA, or other intermediates of the Krebs cycle.
Thus, acetyl CoA is the common intermediate metabolite for the aerobic breakdown of glucose, amino acids, and fatty acids.
Answer: Acetyl Co.A
Fats are broken down into fatty acids and glycerol. Fatty acids undergo $\beta$-oxidation to directly form acetyl CoA.
Proteins are degraded into amino acids, which after deamination can enter the respiratory pathway as pyruvate, acetyl CoA, or other intermediates of the Krebs cycle.
Thus, acetyl CoA is the common intermediate metabolite for the aerobic breakdown of glucose, amino acids, and fatty acids.
Answer: Acetyl Co.A
Hence, the correct answer is option: 'D'.