Which of the following macromolecules is found in the structure of hormones and enzymes?

Which of the following is the simplest amino acid?

Match the following Column-$I$ with Column-$II$ and select the correct option.

Column-$I$ (Type of Amino Acid)	Column-$II$ (Example)
$(A)$ Polar and uncharged $R$ group	$(i)$ Methionine
$(B)$ Non-polar $R$ group	$(ii)$ Glutamic acid
$(C)$ Polar and negatively charged $R$ group	$(iii)$ Lysine
$(D)$ Polar and positively charged $R$ group	$(iv)$ Cysteine

Egyptian mummies still have intact arteries; this is due to:

Assertion : The amino acid glycine comes under the category of nonessential amino acids.
Reason : This is due to the fact that it can not be synthesised in the body.

Insulin is