Chemistry - Biomolecules Question with Solution | TestHub

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{N}={\mathrm{CH}}_2\right)\mathrm{COOH}$

${\left({\mathrm{CH}}_3\right)}_2\mathrm{CH}.\mathrm{CH}\left({\mathrm{NH}}_2\right)\mathrm{COOH}$

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CONHCH}}_2\mathrm{COOH}$

$\mathrm{HOOC}\cdot {\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{COCOOH}$