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  1. Enzymes enhance the rate of reaction by
    1. forming a reactant-product complex
    2. changing the equilibrium point of the reaction
    3. combining with the product as soon as it is formed
    4. lowering the activation energy of the reaction
Correct Option: D

Activation energy is the energy required to overcome energy barrier of the reactants and make them reactive to start a chemical reaction. Enzymes lower the requirement of activation energy.


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