In acidic medium, amino acids can carry positive charge and act as a/an?

Explanation

In an acidic medium, amino acids can carry a positive charge by losing a proton (H+) from their amino group (NH2). When the amino group loses a proton, it becomes positively charged (NH3+). This positively charged amino group can act as a base by accepting a proton from the surrounding medium.Amino acids have both an amino group (NH2) and a carboxyl group (COOH) in their structure. Depending on the pH of the surrounding medium, these functional groups can become charged. In an acidic medium, the amino group gains a proton and becomes positively charged, while the carboxyl group remains negatively charged (COO-).Amino acids are amphoteric molecules, meaning they can act as both acids and bases depending on the pH of their environment. In an acidic medium, the amino group's tendency to accept a proton makes the amino acid act as a base.