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Function and structure. Enzymes are very efficient catalysts for biochemical reactions. They speed up reactions by providing an alternative reaction pathway of lower activation energy. Like all catalysts, enzymes take part in the reaction - that is how they provide an alternative reaction pathway.
Best Answer: An increase in temperature results in more kinetic energy of the enzyme and the substrate. More kinetic energy results in more collisions between the enzyme and the substrate.In turn, the number of successful collisions increases and more enzyme-substrate complexes form.Therefore an increase in temperature increases the rate at which enzyme substrate complexes form. However, all enzymes have an optimum temperature at which it will work best and favour the activity.Eg. pepsin, an enzyme which works in the stomach has an optimum temperature of between 30-40oC, which is around the human body temperature.o, the rate of enzyme activity decreases once temperature is above its optimum temperature. There is a general rule that every 10oC increase makes the rate double, until the optimum temperature of course. This is called the Q10 effect.