Practise reading optimum pH from activity curves and explaining how unsuitable pH alters or denatures the active site, preventing complementary substrate binding.
Explain why amylase digests starch in the small intestine but does not digest starch in the stomach.
any six from:
1 stomach produces, gastric juice / hydrochloric acid / HCl ;
2 acidic / low pH, in stomach ;
3 (acid) denatures, amylase / enzyme ;
4 changes shape of the active site ;
5 (active site) no longer complementary (shape) to, substrate / starch ;
6 cannot form enzyme-substrate complexes ;
7 bile is released into the, small intestine / duodenum ;
8 bile is an alkaline mixture ;
9 neutralises the acidic mixture ;
10 idea of suitable pH for amylase to work in small intestine ;
MP1 A stomach contains gastric juice / HCl