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Lock and Key Model

Lock and Key Model

Author: Nathan Lampson

This lesson will show that each enzyme fits to a specific structure using the lock and key model.

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The way that enzymes and substrates fit together is known as the lock and key model.  The exact shape of the active site on an enzyme fits with the exact shape of the substrate that it reacts with.  When an enzyme and substrate fit together, chemical reactions take less energy to occur, the resulting molecules formed from a substrate are known as the product.


In the same way that two puzzle pieces fit together in a very specific way, enzymes and substrates fit together.

Lock and Key Model