Question 1
An amino acid can exist as a ________, which is a dipolar ion that carries both positive and negative charge.
◦ zwitterion
◦ cation
◦ anion
◦ none of these
Question 2
Amino acids are considered amphoteric because ________.
◦ they do not react with acids or bases
◦ they only react with bases
◦ they only react with acids
◦ they react with both acids and bases
◦ none of these