This higher tier covers Beyond GCSE: Induced Fit Model 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. This section is most useful once the core foundation idea is secure, because it adds the detail that pushes answers higher.
Topic position
Section 4 of 19
Practice
20 questions
Recall
25 flashcards
Beyond GCSE: Induced Fit Model
Note: The induced fit model is covered at A-level Biology, not required for GCSE.
Induced Fit Model (Modern, A-level):
- Enzyme active site is flexible and changes shape slightly when substrate binds
- Substrate binding induces a conformational change in the active site
- Better explains enzyme specificity and regulation at molecular level
- Accounts for allosteric control and competitive inhibition
The induced fit model is now accepted as more accurate, but for GCSE you only need the lock-and-key model.