Skip to content
Brainlag

Theme

Colour

Brainlag Learn / GCSE Biology

Infection and response

Pathogens and how they spread, the body's defences and the immune system, vaccines, antibiotics and resistance, drug trials, and (Biology only) monoclonal antibodies and plant disease.

Lessons

  1. Pathogens and how they spreadThe four kinds of pathogen, the diseases you need for each, how they spread and how that spread is cut down. 20 min, free
  2. Defences and the immune systemThe barriers that keep pathogens out, and how white blood cells destroy the ones that get in. 20 min, free
  3. Vaccines, antibiotics and resistanceHow vaccines give immunity, herd immunity and coverage data, what antibiotics and painkillers do, and how resistant bacteria arise. 25 min, Plus
  4. Discovering and testing drugsWhere drugs come from, the stages of testing, placebos and double-blind trials, and percentage reductions from trial tables. 25 min, Plus
  5. Monoclonal antibodiesHow hybridoma cells make one antibody in bulk, and how monoclonal antibodies are used in tests and treatment. 20 min, Plus, Biology only, Higher tier
  6. Plant disease and plant defencesSpotting and identifying plant disease, nitrate and magnesium deficiency, and the physical, chemical and mechanical defences of plants. 20 min, Plus, Biology only

Practise and test

AQA, Pearson Edexcel and OCR are registered trade marks of their owners. Brainlag Learn is independent: it is not affiliated with or endorsed by any exam board, and every question on it is original.