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Enzymes as catalysts

Enzymes catalyse reactions by lowering the activation energy of the reactions.

All reactions have an activation energy. This is the energy that is required for the reaction to occur. The larger the activation energy, the slower the reaction will be.

By lowering the activation energy, the reaction will proceed faster.

Enzymes reduce the energy barrier between reactants and products.
Enzymes reduce the energy barrier between reactants and products.