The lock-and-key theory is the explanation of how a coenzyme functions to modify the substrate which provides a specific product.

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The lock-and-key theory explains how enzymes and substrates fit together with specificity, similar to a lock and key, but it does not specifically describe the function of coenzymes. Coenzymes are non-protein compounds that assist enzymes in their catalytic activity.

The Lock-And-Key Theory Is the Explanation of How a Coenzyme