BRAINCAKELock and Key Model
The previous model of enzyme action was that the substrate fits precisely into the active site like a key fits in a lock.
The shape of the enzyme's active site is complementary to a specific substrate which fits exactly into the active site.
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Key terms in this lesson
- active site
- The region of an enzyme, formed by the tertiary structure, with a shape complementary to its substrate, where the substrate binds.