This deep dive covers Enzyme Models: Lock and Key within Enzymes in Digestion for GCSE Biology. Enzyme structure and function, digestive enzymes, factors affecting enzyme activity, lock and key model, and practical investigations It is section 4 of 19 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 4 of 19
Practice
20 questions
Recall
25 flashcards
Enzyme Models: Lock and Key
Lock and Key Model:
- Enzyme active site has a fixed, specific shape
- Substrate fits exactly into the active site — like a key in a lock
- Only one substrate (or very similar substrates) can bind — this is enzyme specificity
- Explains why each enzyme only catalyses one type of reaction