pH affects the ionization of starch

You are right that ionization plays an important role in enzyme kinetics through variations in pH. pH does not directly change the ionization of starch in the same way it affects proteins or amino acids. Starch is a polysaccharide composed of glucose units linked by glycosidic bonds, and it does not have ionizable groups like those found in amino acids or proteins. Therefore, changes in pH do not significantly alter the ionization state of starch itself. Good try, let’s give it another go!