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Which of the following amino acids are aromatic in nature?

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in Chemistry – Class 12 by (188k points)
Which of the following amino acids are aromatic in nature?

(a) Methionine

(b) Isoleucine

(c) Proline

(d) Histidine

This question was posed to me in class test.

Question is taken from Biomolecules topic in portion Biomolecules of Chemistry – Class 12

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Best answer
Correct option is (d) Histidine

Best explanation: Amino acids can be aromatic only if their side chain consists of an aromatic compound. Methionine has a sulphur containing straight chain. Isoleucine has an isobutyl side group. Proline has a complex cyclic side chain. Histidine has a basic aromatic side group, imidazole.

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