Chemistry - Biomolecules Question with Solution | TestHub

In aqueous solution, the$\mathrm{\alpha }$-amino acids form mostly Zwitter ions.
$\mathrm{N}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\rightleftharpoons {\mathrm{H}}_3{\mathrm{N}}^{+}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}\mathrm{O}{\mathrm{O}}^{-}$
If a base is added,${\mathrm{H}}^{+}$ion is furnished by$-\stackrel{+}{\mathrm{N}}{\mathrm{H}}_3$. Hence, the acidic group is$-\stackrel{+}{\mathrm{N}}{\mathrm{H}}_3$.