at-ph-7-what-is-the-protonation-state-of-the-carboxyl-group-in-an-amino-acid

Question

At pH 7, what is the protonation state of the carboxyl group in an amino acid?

Accepted Answer

Deprotonated (COO-)

Answer

Doubly protonated (COOH2+)

Answer

Protonated (COOH)

Answer

Neutral (COO)