LIFE SCIENCE

Detailed explanation-1: -There are three amino acids that have basic side chains at neutral pH. These are arginine (Arg), lysine (Lys), and histidine (His). Their side chains contain nitrogen and resemble ammonia, which is a base.

Detailed explanation-2: -Arginine has guanidine moiety in its side chain hence it is the most basic amino acid.

Detailed explanation-3: -The basic amino acid contains more than one amino group lysine and arginine are the basic amino acid as they contain more amino group than acidic group. Histidine is also a basic amino acid.

Detailed explanation-4: -Lysine and arginine are basic amino acids because their side chain group contains a full positive charge at the physiological pH.

Detailed explanation-5: -A basic amino acid contains more than one amino group. Lysine and arginine are the basic amino acid as they contain more amino group than acidic group.