Biology for IGCSE & O level - Enzymes (Section 3 - No. 15)
According to the 'lock and key' model, what is the relationship between an enzyme and its substrate?
The enzyme changes shape to fit the substrate.
The enzyme and substrate have complementary shapes.
The substrate binds to the enzyme at multiple sites.
The enzyme only works with competitive inhibitors.
Explanation
The 'lock and key' model emphasizes the specificity of enzymes, where the enzyme and substrate have matching shapes.
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