The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.

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Enzymes are the proteins that catalyze the biochemical reactions in living cells. They reduce the activation energy required for a reaction to proceed, thus increasing the rate of the reaction. This property makes enzymes highly efficient biological catalysts. Cofactors, vitamins, coenzymes, and ATP are necessary for the proper functioning of enzymes, but they do not catalyze the reaction directly.

The Cell's Metabolic Reactions Involve the Participation of _____ That