Interferon is connected with:

Which of the following is a basic amino acid?

In an oligopeptide named Alanyl-glycyl-phenyl-alanyl-isoleucine,the number of $sp^2$ hybridised carbons is $...........$.

Which of the following amino acids contains a heterocyclic ring in its side chain $(R)$ group?

The secondary structure of protein is stabilized by:

Assertion $(A)$: The denaturation of proteins can destroy all $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ protein structures.
Reason $(R)$: Curdling of milk is due to denaturation of proteins.
The correct option among the following is