1. Increase in temperature increases the average kinetic energy in particles.
2. If we increase the kinetic energy of particle, we increase the number of collisions therefore we will have more reactions.
3. Enzyme + substrate -------enzyme substrate complex ---------- enzyme + product
4. As we increase the temperature, the kinetic energy of the enzyme and the substrate increase, so that we have more complexes formed and product is formed quickly.
5. We find that we reach a temperature after which the rate of reaction decreases quite dramatically.
6. We have an assymetrical curve on a graph for the effect of the temperature on the rate of enzyme catalysed reaction.

7. The temperature declines because the kinetic energy changes the shape of the active site of the enzyme and therefore it doesn't function to produce product, this is known as denaturing.