Biology A-Level
complementary binding site
What complementary binding site means in Biology A-Level, as defined for AQA.
Definition of complementary binding site
Check what you remember
Read the wording for your board, then hide it and explain complementary binding site in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A binding site with a tertiary structure complementary to one antigen, so binding is highly specific and forms an antigen-antibody complex.
Topics that use complementary binding site
- Cell recognition and the immune system (AQA A-Level)
Related terms
- active immunity
- agglutination
- animal use in production and testing
- antibody
- antigen
- antigen-antibody complex
- antigen-presenting cell
- antigens in vaccines
Using complementary binding site 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