Question

Which one out of A - D given below correctly represents the structural formula of the basic amino acid?

• A. B
• B. C
• C. D
• D. A

Answer 1

The correct option is C D

Acidic amino acids have more carboxyl groups (COOH) than amino
groups (NH${}_2$).
Basic amino acids have more NH${}_2$ groups than COOH groups.
Neutral amino acids have equal number of NH${}_2$ groups and COOH groups.

A - It is the structure of glutamic acid which is a acidic amino acid.
B - It is the structure of serine which is a neutral amino acid.
D - It is the structure of lysine which is a basic amino acid.
C - It is not a structure of amino acid.