Wales GCSE Integrated Science Practice Questions - Made-for-Wales GCSE Integrated Science (Single Award) (WJEC) Exam

According to the lock-and-key model, why is an enzyme specific for a substrate?

The enzyme changes permanently after every reaction The active site has a complementary shape to the substrate The substrate destroys the enzyme after binding All enzymes work on every type of food molecule

Correct Answer:

The active site has a complementary shape to the substrate

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