A protein functions as an acid-base buffer system by the -COOH group of a molecule accepting H⁺ in the presence of excess acid and the NH₃ group of a molecule releasing H⁺ in the presence of excess base.

Question

Quizplus · Accepted Answer

The statement correctly describes the role of the -COOH and NH₃ groups in a protein as an acid-base buffer system. The -COOH group can act as a proton acceptor (acid) while the NH₃ group can act as a proton donor (base), allowing the protein to help maintain a stable pH in a solution.

A Protein Functions as an Acid-Base Buffer System by the -COOH