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

Multiple Choice

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.