BI-32
Lock-and-key model
Biology · Secondary 3 · Medium · Lock-and-key model
The diagram of an enzyme reaction shows that the active site fits only one substrate. Which statement best describes this idea?
- Enzymes can react with any substrate present.
- The active site changes shape permanently after each reaction.
- Only a substrate with a complementary shape can bind to the active site.
- Substrates change shape to fit any active site.
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