1. Enzymes are catalysts because they lower the
of a chemical
reaction,
A. substrate
B. induced fit
C. temperature
D. activation energy

D. activation energy

Explanation:

A catalyst lowers the activation energy of a reaction. Activation energy is the initial amount of energy needed to set a reaction into motion. Catalysts, including enzymes, can lower the activation energy to speed up reactions and make them easier to initiate.

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