Q8 / 75 · JEE Main 2026 (21 January Shift 1) · Chemistry
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 $\mathrm{MeS}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-$.
Choose the correct answer from the options given below :
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 $\mathrm{MeS}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-$.
Choose the correct answer from the options given below :
- Correct answerAA and D Only
- BB and E Only
- CC and E Only
- DC and D Only
Solution
A. Arginine and Tryptophan are essential amino acids - True
B. Histidine contains imidazole ring (heterocyclic ring with N) - Statement is False
C. Proline has a 5-membered pyrrolidine ring, not 6-membered - False
D. Glycine ($NH_2-CH_2-COOH$) has no chiral center (α-carbon has two H atoms) - True
E. Cysteine side chain is $-CH_2-SH$ (thiol). $MeS-CH_2-CH_2-$ is the side chain of Methionine, not Cysteine - False
Correct statements: A and D only
B. Histidine contains imidazole ring (heterocyclic ring with N) - Statement is False
C. Proline has a 5-membered pyrrolidine ring, not 6-membered - False
D. Glycine ($NH_2-CH_2-COOH$) has no chiral center (α-carbon has two H atoms) - True
E. Cysteine side chain is $-CH_2-SH$ (thiol). $MeS-CH_2-CH_2-$ is the side chain of Methionine, not Cysteine - False
Correct statements: A and D only
Hence, the correct answer is option: 'A'.