If pH increases in a protein buffer system, which of the following is most likely to occur?
A) The amino group of the amino acid accepts an additional hydrogen ion.
B) Carbon dioxide is converted to carbonic acid.
C) The carboxyl group of the amino acid dissociates, releasing a hydrogen ion.
D) In solution, dihydrogen phosphate reversibly dissociates into a hydrogen ion and monohydrogen phosphate.
E) Carbonic acid dissociates into hydrogen ions and bicarbonate ions.

Question

Quizplus · Accepted Answer

In a protein buffer system, the amino acid acts as a weak acid and the carboxyl group acts as a weak base. When the pH increases, the carboxyl group will dissociate, releasing a hydrogen ion to counteract the increased pH. Therefore, choice C is the most likely to occur.

If PH Increases in a Protein Buffer System, Which of the Following