Which statement gives a description of enzyme-catalysed reactions?
- AAll enzymes work best at the same pH.
- BAs an enzyme-catalysed reaction progresses, the concentration of reactants increases.
- CAs the temperature of an enzyme-catalysed reaction increases from $0\,^{\circ}\text{C}$ to $20\,^{\circ}\text{C}$, the frequency of effective collisions increases.
- DEnzymes are denatured as the temperature of an enzyme-catalysed reaction is lowered from $20\,^{\circ}\text{C}$ to $0\,^{\circ}\text{C}$.