Which bond is responsible for the secondary structure of proteins?

The $pH$ value of the solution in which a particular amino acid does not migrate under the influence of an electric field is called the

Which protein maintains the blood sugar level in the human body?

The secondary structure of proteins is stabilized by which bond?

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $A$ solution of the product obtained by heating a mole of glycine with a mole of chlorine in the presence of red phosphorus generates a chiral carbon atom.
Reason $R$: $A$ molecule with $2$ chiral carbons is always optically active.
In the light of the above statements,choose the correct answer from the options given below:

Insulin is a .........