Biology for IGCSE & O level - Enzymes (Section 3 - No. 41)
How does the 'lock and key' model explain enzyme action?
The enzyme actively changes shape to fit any substrate.
The substrate is broken down into multiple parts.
The enzyme and the substrate have complementary shapes, like a lock and key.
Enzymes catalyze reactions using their structure.
Explanation
The active site and substrate fit together perfectly.
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