Botany - Biomolecules Question with Solution | TestHub

In the given figure a tetrapeptide is shown. Here, amino acids are indicated as (a), (b) (c) and (d). (a) indicates N-terminal amino acid and (d) indicates Cterminal residue. As it can be seen from the figure sulphur containing amino acid is $b$ and carboxyl group $(-\mathrm{COOH})$ containing amino acid is (d). Residue (d) indicates glutamic acid, an acidic residue due to presence of $(-\mathrm{COOH})$ group. So, the correct answer is 'd is acidic amino acid - glutamic acid'.