What charged group(s) is/are present in glycine at a pH of 7?

Question

Quizplus · Accepted Answer

At pH 7, the amino group (-NH2) of glycine would be protonated to form -NH3+, while the carboxyl group (-COOH) would lose a proton to form -COO-. Therefore, choices A and B are present in glycine at pH 7. Choice C is not present, because the amino group has already accepted a proton, so it is no longer capable of accepting another. Thus, the best answer is D, which includes A and B.

What Charged Group(s) Is/are Present in Glycine at a PH