easy · MCAT bio-biochem

Enzymes work by lowering the activation energy needed for a chemical reaction to occur, which allows the reaction to proceed much faster than it would on its own.

According to this passage, how do enzymes speed up a reaction?

  1. By raising the activation energy required
  2. By adding extra reactant molecules
  3. By permanently changing the products of the reaction
  4. By lowering the activation energy required

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