Identify a side chain $(R)$ group present in serine,an amino acid.

Identify the basic amino acid from the following.

Which of the following tests cannot be used for identifying amino acids?

Insulin is

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 $:$

Coagulation of egg,on heating,is because of: