An enzyme has a active site which compliments (fits with) a specific substrate exactly (before binding). It states that the enzyme has a fixed shape. A substrate will go into an enzyme like a key goes into a lock and form an enzyme-substrate complex; this then changes the bonds in the substrate to form the products.
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| http://chsweb.lr.k12.nj.us |
The induced fit theory
This states that an enzyme has an active site which is not perfect for a substrate, but that it is flexible.
A substrate will alter the shape of the active site to make it complimentary, the changed shape will alter the bonds in the substrate creating the products.
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| http://chsweb.lr.k12.nj.us |
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