Question
Which from following amino acids has a unique structure so that the side chain connects to the back bone of amino acid at two points ?
MHT CET
Chemistry
Biomolecules
2026
MHT CET 2026 (19 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. Histidine
- B. Proline
- C. Tryptophan
- D. Tyrosine
Answer
B. Proline
Step-by-step solution
Proline is a unique amino acid because its side chain is bonded to both the -carbon and the amino group nitrogen, forming a cyclic pyrrolidine ring. Due to this cyclic structure, the side chain connects to the backbone of the amino acid at two points. Other given amino acids (Histidine, Tryptophan, Tyrosine) have side chains that connect only to the -carbon. Answer: Proline
Related: Chemistry — Biomolecules · All PYQ Banks