Biology A-Level
Competitive inhibitors
What Competitive inhibitors means in Biology A-Level, as defined for OCR.
Definition of Competitive inhibitors
Check what you remember
Read the wording for your board, then hide it and explain Competitive inhibitors in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
These resemble the substrate and bind the active site, so they compete with substrate molecules, and their effect is reduced by raising substrate concentration.
Topics that use Competitive inhibitors
- Enzymes (OCR A-Level)
Related terms
- Activation energy and enzyme–substrate complexes
- Cellular metabolism
- Coenzyme
- Cofactor
- Digestion and absorption of products
- Effect of missing cofactors on reaction rate
- Effect of substrate concentration on inhibition
- Enzyme specificity and active-site complementarity
Using Competitive inhibitors 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