Proteins when heated with conc. $HNO_3$ give a yellow colour. This is

Assertion : Proteins are made up of $\alpha-$ amino acids.
Reason : During denaturation,secondary and tertiary structures of proteins are destroyed.

Proteins are built up of

If the side chain group $-R$ for an amino acid is $-CH_{2}OH$,identify the amino acid from the following:

The functional groups present in Asparagine,a nonessential amino acid,are

Amino acids containing a heterocyclic ring are:
$(i)$ Histidine
$(ii)$ Valine
$(iii)$ Arginine
$(iv)$ Proline