The graph illustrates how pH affects the speed of an enzyme-catalysed reaction. What explains the way pH affects the reaction rate?
- AAs the pH increases from 5 to 7, the kinetic energy increases.
- BAs the pH increases from 7 to 9, the frequency of enzyme and substrate collisions increases.
- CThe shape of the enzyme’s active site changes as the pH increases from 7 to 9.
- DThe substrate denatures at pH 7.