Enzymes are protiens (made from the monomer animo-acid)
This means that they have a specific shape.
This factor means that it can only catylse a specific reaction.
This had lead to the lock and key theory.
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The induced fit model.
Scientist have recently discovered that inhibtors with a similar shape to the active site are able to be cataylsed.
This has lead to the induced fit model:
This states that when the enzyme and the substrate form a complex, structual changes occur so that the active site fits precisely around the substrate.
After the reaction takes place the products no longer fit the active site and thus move away.
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