BI-1331
Lock-and-key model
Biology · Secondary 4 · Medium · Lock-and-key model
An enzyme breaks down a specific substrate. The substrate fits exactly into the enzyme’s active site.
Which description best explains this using the lock‑and‑key hypothesis?
Which description best explains this using the lock‑and‑key hypothesis?
- Any substrate can bind if the temperature is high enough
- The active site changes randomly until it fits the substrate
- Only a substrate with a complementary shape can bind to the active site
- The enzyme and substrate must have identical overall size
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