Key term for AQA GCSE Biology, used in Hormonal Coordination.
A unique protein marker on the surface of a cell used by the immune system to identify "self" vs "non-self".
Antigen appears in AQA GCSE Biology revision content for Homeostasis, especially Hormonal Coordination and Water and Nitrogen Balance.
Homeostasis
Hormonal Coordination • Water and Nitrogen Balance
Infection and Response
Monoclonal Antibodies • Antibody Production
Infection and Response
Communicable Diseases • Vaccination
Infection and Response
Communicable Diseases • Human Defence Systems
Biological Organisation
Animal Systems • Health and Disease
Biological Organisation
Animal Systems • Coronary Heart Disease
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