A. Carboxyl to amino group
B. Amino to carboxyl group
C. Amino group only
D. Carboxyl group only
¨ A is correct. In the formation of zwitterions, the proton goes from the carboxyl group (-COOH) to the amino group (-NH2), resulting in the formation of a dipolar ion with both positive and negative charges. This is known as an internal salt or zwitterion.
Submitted by :- Jamil Ahmed