Question

Amino acids can be distinguished from one another by
A) type of bond between the R group and the rest of the molecule
B) the number of R groups found on the amino acid molecules
C) the chemical properties of their R groups
D) the chemical properties of the amino and carboxyl groups

Answer 1

The correct option is c

Answer 2

Here the answer will be :-

C) the chemical properties of their R groups.

(A) The type of bond between the R group and the rest of the amino acid molecule. These bond is not important, most of them have the same bonding. So this answer is incorrect

B) The number of R groups found on the amino acid molecules.  The number of groups R is not consider to distinguished amino acids, they only have 1 R group so this answer is incorrect.

C) The chemical properties of their R groups. This is the right answer because the chemical properties of R groups will react with an amino acid.

D) The chemical properties of their amino and carboxyl groups. All amino and carboxyl groups have the same properties. So this answer is  also not right.