Factors affecting enzyme activity

Enzyme concentration

The higher the enzyme concentration, the more enzymes there are to form enzyme-substrate complexes, leading to an increase in enzyme activity.

Enzyme factor concentration

This happens up to a certain point. Enzyme activity then levels off (plateaus) as there are not enough substrate molecules to react with the extra enzymes.

Optimum

The optimum value for these factors is the value that allows the maximum rate of reaction.