GCSE Biology
Infection & Response
Infection & Response is a core strand in Biology. Work through the topics below in any order, or follow your course — each guide includes explanations, common mistakes and exam-style practice.
Topic guides
Communicable Diseases
Communicable Diseases is the clearest entry route into the Infection & Response section.
Open guideMonoclonal Antibodies
Monoclonal antibodies are identical antibodies produced from a single clone of a B-lymphocyte.
Open guideHuman Defence Systems
The human body has several non-specific defence systems to prevent pathogens from entering.
Open guideVaccination
Vaccination involves introducing a small quantity of a dead or inactive form of a pathogen into the body to stimulate the white blood cells to produce antibodie
Open guideAntibiotics & Painkillers
Antibiotics are drugs that kill bacteria or prevent them from growing, but they do not work against viruses.
Open guidePlant Disease
Plants can be infected by a range of pathogens, including viruses, bacteria, and fungi, which can cause diseases that damage or kill the plant.
Open guide
Revision strategy
Students often slip on the details explained in our guides — read the “common mistakes” section in each topic.
- Alternate between reading a guide and doing timed questions — don’t only re-read notes.
- Return to this hub anytime; new guides appear automatically as we publish them.