Fill in the blanks :
1. Based on the nature of ..a…. there are 20 amino acids.
2. Based on number of …b..and ..c…. groups, there are acidic, basic and neutral amino acids.
3. The R group in serine is ….d...

Options

A. a-amino,b-R group, c-carboxyl, d-methyl
B. a-carboxyl, b-amino,c-R group,d-hydroxymethyl
C. a-R group,b-carboxyl,c-amino,d-hydroxymethyl
D. a-R group,b-caboxyl, c-amino, d-methyl

Answer

C

Explanation

(C) Based on the nature of R group there are 20 amino acids.
Based on number of carboxyl and amino groups, these are acidic , basic and neutral amino acids.
The R group is serine is hydroxy methyl.