NEET 2023 Phase 1 · BiologyPrevious Year Question
Fatty acids are connected with the respiratory pathway through:
Answer: (C) Acetyl CoA. Answer: (C) Acetyl CoA.
- A.Dihydroxy acetone phosphate
- B.Pyruvic acid
- C.Acetyl CoA✓
- D.α-Ketoglutaric acid
Correct Answer
(C) Acetyl CoA
Solution & Explanation
Answer: (C) Acetyl CoA. Solution: In the amphibolic pathway, fats are first broken into glycerol and fatty acids; fatty acids are then degraded to acetyl CoA before entering the respiratory pathway (Krebs cycle). Glycerol enters as PGAL (linked via dihydroxyacetone phosphate), while pyruvic acid and alpha-ketoglutaric acid are entry points for carbohydrates and certain amino acids, not for fatty acids. NCERT: Ch 12, p.162, line ~20: "If fatty acids were to be respired they would first be degraded to acetyl CoA and enter the pathway".
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