Among the following peptides, identify the pair where the name and its structure are correctly matched.

Step-by-step solution

The structure of a peptide is named by listing the amino acid residues from the N-terminal end to the C-terminal end. The N-terminal amino acid has a free -NH₂ group, and the C-terminal amino acid has a free -COOH group. 1. The first structure shows H₂N-CH₂-CO-NH-CH(CH₂SH)-COOH . The N-terminal is Glycine (Gly) and the C-terminal is Cysteine (Cys). The name provided is Gly-Ala, which is incorrect. 2. The second structure shows H₂N-CH(CH₃)-CO-NH-CH₂-CO-NH-CH(CH₂C₆H₅)-COOH . The residues are Alanine (Ala), Glycine (G