Question

The correct structure of dipeptide, Gly-Ala (glycyl alanine) is:

• A. \(\text{H}_2\text{NCH}_2\text{CONHCH(CH}_3\text{)COOH}\)
• B. \(\text{HOOC} - \text{CH}_2 - \text{NH} - \text{CO} - \text{CH(CH}_3\text{)} - \text{NH}_2\)
• C. \(\text{HOOC} - \text{CH(CH}_3\text{)} - \text{NH} - \text{CO} - \text{CH}_2 - \text{NH}_2\)
• D. \(\text{H}_2\text{N} - \text{CH(CH}_3\text{)} - \text{CO} - \text{NH} - \text{CH}_2 - \text{COOH}\)

Answer 1

The Correct Option is A

The dipeptide Gly-Ala is formed by joining the amino group of glycine with the carboxyl group of alanine, leading to the structure \(\text{H}_2\text{NCH}_2\text{CONHCH(CH}_3\text{)COOH}\).The correct dipeptide structure involves the amino group (NH2) of glycine forming a peptide bond with the carboxyl group (COOH) of alanine. Thus, the correct structure is:CH₂ - CO - NH - CH(CH₃) - COOH.