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NEET levelSingle correct optionDifficulty 1 of 3bm088

In the dipeptide Gly-Ala (written from N-terminal to C-terminal), the amino acid with the free $- NH X_{2}$ (or $- NH X_{3} X^{+}$ ) group is

Aglycine
Balanine
Cboth glycine and alanine
Dneither, both groups are used in the peptide bond

Answer: A

By convention a peptide is written with the N-terminal residue (free amino group) on the left. In Gly-Ala, glycine is N-terminal and alanine is C-terminal with the free carboxyl group.

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