The proteins with a prosthetic group are called

Consider the following statements:
Statement-$I$: Lysine and arginine are essential and basic amino acids.
Statement-$II$: Leucine and phenylalanine are non-essential and neutral amino acids.

The general structure of $\alpha$-amino acid can be represented as shown below. Which amino acid is not correctly matched with the $R$ group given?

Identify the basic $\alpha$-amino acid from the following.

Thyroxine produced in the thyroid is an iodinated derivative of . . . . . . amino acid.

The number of essential amino acids in man is