The most important energy carrier in all the living cells is

Thiol group is present in:

The one that does not stabilize $2^{\circ}$ and $3^{\circ}$ structures of proteins is

Which among the following $\alpha$-amino acids does $NOT$ have a chiral carbon atom?

Identify the side chain $(R)$ group present in Leucine,an amino acid.

Given below are two statements $:$
Statement $(I):$ On hydrolysis,oligopeptides give rise to a fewer number of $\alpha$-amino acids,while proteins give rise to a large number of $\beta$-amino acids.
Statement $(II):$ Natural proteins are denatured by acids,which convert the water-soluble form of fibrous proteins to their water-insoluble form.
In the light of the above statements,choose the most appropriate answer from the options given below $:$