<prompt> Salivary amylase is Inactivated by -EnteropeptidaseLow pH of the stomachHigh pH of the intestineNone  <response>: Ans. is b i.e., Low pH of the stomach o Saliva contains amylase salivary amylase or ptyalin, which hydrolyzes starch into disaccharide maltose and a mixture of oligosaccharides. o Its action is very short- lasting because it is inactivated by acidic gastric pH 3 shortly after entering the stomach. Salivary amylase optimally active at pH of around 6.9 6.5 - 7. o It is inactive at a pH below 4.5. 