Indole ring is present in______________?
Correct answer: C. Tryptophan
- A. Methionine
- B. Valine
- C. Tryptophan
- D. Histidine
Explanation
Tryptophan contains an indole ring, which is a fused benzene-pyrrole structure. Valine is branched-chain, methionine contains sulfur, and histidine contains an imidazole ring.
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