Biology · BIOMOLECULES

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In solutions of different pH, the electric charge and structure of an amino acid change dynamically. Reason (R): Amino acids possess ionizable functional groups, namely the amino (-NH2) and carboxyl (-COOH) groups. In the light of the above statements, choose the correct answer from the options given below:

1. A
   Both (A) and (R) are true and (R) is the correct explanation of (A).
2. B
   Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
3. C
   (A) is true but (R) is false.
4. D
   (A) is false but (R) is true.