Biology A-Level
antigen
What antigen means in Biology A-Level, as defined for AQA.
Definition of antigen
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Reference: AQA
A molecule, usually a protein or glycoprotein and usually found on a cell surface, that is recognised as foreign and stimulates an immune response.
Topics that use antigen
- Cell recognition and the immune system (AQA A-Level)
Related terms
- active immunity
- agglutination
- animal use in production and testing
- antibody
- antigen-antibody complex
- antigen-presenting cell
- antigens in vaccines
- Collapse of the specific response
Using antigen in the exam
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