BI-202
Lock-and-key model
Biology · Secondary 3 · Medium · Lock-and-key model
The diagram (not shown) represents an enzyme with a specific active site. Which statement best explains why only one type of substrate fits this enzyme?
- The enzyme can change its active site to fit any substrate.
- The active site has a fixed shape complementary to one substrate.
- The substrate changes shape to fit any enzyme.
- The enzyme reacts with all molecules in the cell equally.
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