Complete Exam Guide · 2027 edition

AQA GCSE Biology Revision Guide

70 topics across 7 units, with diagrams, exam tips, checklists and the mistakes that cost marks. The first topic in every unit is free to read — the full guide is coming soon.

1. Cell Biology

  1. Eukaryotes, Prokaryotes & Cell StructureFree
  2. Cell Specialisation & DifferentiationPart of the full Exam Guide
  3. MicroscopyPart of the full Exam Guide
  4. Culturing Microorganisms [Biology only]Part of the full Exam Guide
  5. Chromosomes, Mitosis & The Cell CyclePart of the full Exam Guide
  6. Stem CellsPart of the full Exam Guide
  7. Diffusion & Exchange SurfacesPart of the full Exam Guide
  8. Osmosis & Active TransportPart of the full Exam Guide
  9. Exam ChecklistPart of the full Exam Guide
  10. Common Exam MistakesPart of the full Exam Guide
  11. Exam Ready QuestionsPart of the full Exam Guide

2. Organisation

  1. Principles of Organisation & EnzymesFree
  2. The Digestive SystemPart of the full Exam Guide
  3. Required Practicals 4 & 5: Food Tests & EnzymesPart of the full Exam Guide
  4. The Heart, Lungs & Blood VesselsPart of the full Exam Guide
  5. Blood & Coronary Heart DiseasePart of the full Exam Guide
  6. Health, Lifestyle & CancerPart of the full Exam Guide
  7. Plant Tissues & OrgansPart of the full Exam Guide
  8. Transpiration & TranslocationPart of the full Exam Guide
  9. Exam ChecklistPart of the full Exam Guide
  10. Common Exam MistakesPart of the full Exam Guide
  11. Exam Ready QuestionsPart of the full Exam Guide

3. Infection & Response

  1. Communicable Diseases & PathogensFree
  2. Human Defence Systems & VaccinationPart of the full Exam Guide
  3. Antibiotics, Painkillers & Drug DevelopmentPart of the full Exam Guide
  4. Monoclonal Antibodies [Biology only, Higher Tier]Part of the full Exam Guide
  5. Plant Disease & Defences [Biology only]Part of the full Exam Guide
  6. Exam ChecklistPart of the full Exam Guide
  7. Common Exam MistakesPart of the full Exam Guide
  8. Exam Ready QuestionsPart of the full Exam Guide

4. Bioenergetics

  1. PhotosynthesisFree
  2. Rate of Photosynthesis & Limiting FactorsPart of the full Exam Guide
  3. Required Practical 6: Light Intensity & PhotosynthesisPart of the full Exam Guide
  4. Aerobic & Anaerobic RespirationPart of the full Exam Guide
  5. Response to Exercise & MetabolismPart of the full Exam Guide
  6. Exam ChecklistPart of the full Exam Guide
  7. Common Exam MistakesPart of the full Exam Guide
  8. Exam Ready QuestionsPart of the full Exam Guide

5. Homeostasis & Response

  1. Homeostasis & The Nervous SystemFree
  2. The Brain & The Eye [Biology only]Part of the full Exam Guide
  3. Control of Body Temperature [Biology only]Part of the full Exam Guide
  4. The Endocrine System & Blood GlucosePart of the full Exam Guide
  5. Water & Nitrogen Balance: The Kidneys [Biology only]Part of the full Exam Guide
  6. Hormones in Reproduction & ContraceptionPart of the full Exam Guide
  7. Infertility Treatment & Negative Feedback [Higher Tier]Part of the full Exam Guide
  8. Plant Hormones [Biology only]Part of the full Exam Guide
  9. Exam ChecklistPart of the full Exam Guide
  10. Common Exam MistakesPart of the full Exam Guide
  11. Exam Ready QuestionsPart of the full Exam Guide

6. Inheritance, Variation & Evolution

  1. Sexual & Asexual Reproduction & MeiosisFree
  2. DNA, The Genome & Protein SynthesisPart of the full Exam Guide
  3. Genetic InheritancePart of the full Exam Guide
  4. Variation & EvolutionPart of the full Exam Guide
  5. Selective Breeding & Genetic EngineeringPart of the full Exam Guide
  6. Cloning [Biology only]Part of the full Exam Guide
  7. Darwin, Wallace & Mendel [Biology only]Part of the full Exam Guide
  8. Evidence for Evolution, Fossils & Resistant BacteriaPart of the full Exam Guide
  9. Classification of Living OrganismsPart of the full Exam Guide
  10. Exam ChecklistPart of the full Exam Guide
  11. Common Exam MistakesPart of the full Exam Guide
  12. Exam Ready QuestionsPart of the full Exam Guide

7. Ecology

  1. Communities, Competition & AdaptationsFree
  2. Food Chains, Sampling & Predator–Prey CyclesPart of the full Exam Guide
  3. Cycling of Materials & DecompositionPart of the full Exam Guide
  4. Biodiversity & Human ImpactPart of the full Exam Guide
  5. Trophic Levels & Pyramids of Biomass [Biology only]Part of the full Exam Guide
  6. Food Production [Biology only]Part of the full Exam Guide
  7. Exam ChecklistPart of the full Exam Guide
  8. Common Exam MistakesPart of the full Exam Guide
  9. Exam Ready QuestionsPart of the full Exam Guide