BI-1304
Lock-and-key model
Biology · Secondary 4 · Medium · Lock-and-key model
Lipase is an enzyme that breaks down fats into fatty acids and glycerol. Which statement describes how lipase acts on its substrate according to the lock‑and‑key hypothesis?
- Lipase changes shape to fit any substrate it meets.
- Lipase’s active site fits only fat molecules with a complementary shape.
- Lipase breaks down any large molecule into smaller ones.
- Lipase works only when many different substrates are present.
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