Biology A-Level
induced fit
What induced fit means in Biology A-Level, as defined for AQA.
Definitions of induced fit
Exam boards and our study guides word this term in slightly different ways. Learn the version your board uses.
Check what you remember
Read the wording for your board, then hide it and explain induced fit in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A model in which the active site moulds itself around the substrate as it enters, becoming fully complementary.
The active site is flexible and moulds around the substrate, straining bonds to lower activation energy.
Topics that use induced fit
- Many proteins are enzymes (AQA A-Level)
Related terms
- activation energy
- active site
- competitive inhibition
- conformational change
- denaturation
- enzyme specificity
- enzyme-substrate complex
- intracellular and extracellular enzymes
Using induced fit in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge