Question

Amino acid in zwitter ionic form show

• A. Acid Behaviour
• B. Basic Behavior
• C. Amphoteric Behavior
• D. Neutral Behavior

Answer 1

Answer: (C)

Amphoteric Behavior

Answer 2

Amino acids in their zwitterionic form exhibit amphoteric behavior.

Amino acids contain both an acidic carboxyl group $(COOH)$ and a basic amino group (NH2) in their structure. In their zwitterionic form, the carboxyl group loses a proton (H⁺) and becomes negatively charged $(COO^⁻)$, while the amino group gains a proton and becomes positively charged $(NH₃^⁺)$. This results in the formation of a zwitterion with both positive and negative charges within the same molecule.

Due to the presence of both acidic and basic groups, amino acids in their zwitterionic form can act as both acids and bases. They can donate a proton from the carboxyl group, exhibiting acidic behavior, and they can accept a proton by the amino group, displaying basic behavior. Hence, amino acids in their zwitterionic form are considered amphoteric, meaning they can exhibit both acidic and basic behavior.

Therefore, the correct option is (C): Amphoteric Behavior.