Mechanisms used by enzymes to catalyze reactions are similar in that they all

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Enzymes catalyze reactions by lowering the activation energy barrier, which stabilizes the transition state of the substrate. Therefore, it is common for all mechanisms used by enzymes to involve the stabilization of the transition state of the substrate. This is the fundamental principle behind enzyme catalysis. While some enzymes do involve transient chemical changes or require cofactors or coenzymes, these are not universal mechanisms used by all enzymes. Similarly, permanent chemical changes are often not desirable as they would affect the enzyme's ability to function over time.

Mechanisms Used by Enzymes to Catalyze Reactions Are Similar in That