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JEE Main 2026 Jan 21 Shift 1, Chemistry Q17: Proteins

JEE Main2026Jan 21, Shift 1Chemistry
Q.

Identify the correct statements.

A. Arginine and Tryptophan are essential amino acids.

B. Histidine does not contain heterocyclic ring in its structure.

C. Proline is a six membered cyclic ring amino acid.

D. Glycine does not have chiral centre.

E. Cysteine has characteristic feature of side chain as .

Choose the correct answer from the options given below:

  1. A

    C and E only

  2. B

    B and E only

  3. C

    C and D only

  4. D

    A and D only

Solution

A — true. B — false (Histidine does contain heterocyclic imidazole ring). C — false (Proline is a 5-membered ring). D — true (Glycine has no chiral C). E — false (Cysteine side chain is , not — that's methionine).

A and D only — option (4).

Concept behind this question

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