Irreversible precipitation of proteins is called

Insulin is a protein which plays the role of

At the isoelectric point,in which form does an amino acid exist?

The secondary structure of proteins is stabilized by which bond?

$A$ short peptide on complete hydrolysis produces $3$ moles of glycine $(G)$,$2$ moles of leucine $(L)$ and $2$ moles of valine $(V)$ per mole of peptide. The number of peptide linkages in it are $..............$.

Which of the following amino acids does $NOT$ contain a chiral carbon?