OCR A Revision Notes  |  Year 1

Our free OCR A Level Biology revision notes have been curated to provide a more accessible resource for reviewing OCR Biology A’s most valuable biological content. Stripped-down to the essentials, they highlight the material most commonly tested in exams and needed in studies. The result is a time-effective resource that makes revision clearer, faster, and far less overwhelming.

  1. Microscopy
  2. Microscopy Calculations
  3. Preparing Microscope Slides
  4. Eukaryotic Cell Structure
  5. Prokaryotic Cell Structure
  6. Organelle Involvement in Protein Synthesis
  7. Water
  8. Introduction to Macromolecules
  9. Carbohydrates
  10. Lipids
  11. Proteins
  12. Inorganic Ions
  13. Chemical Tests for Biomolecules
  14. Colorimetry
  15. Chromatography
  16. Nucleotides and Nucleic Acids
  17. DNA Replication
  18. Genetic Code
  19. Protein Synthesis
  20. Enzymes
  21. Biological Membranes
  22. Water Potential and Osmosis
  23. Eukaryotic Cell Cycle
  24. Mitosis and Cytokinesis
  25. Meiosis
  26. Stem Cells
  27. Organisation in Animals
  28. Organisation in Plants
  1. Exchange Surfaces
  2. Mammalian Gaseous Exchange System
  3. Mammalian Ventilation
  4. Oxygen Uptake in Mammals
  5. Measuring Oxygen Uptake in Mammals
  6. Ventilation and Gas Exchange in Gills
  7. Ventilation and Gas Exchange in Insects
  8. Transport Systems in Animals
  9. Blood Vessels
  10. The Heart
  11. Haemoglobin and Red Blood Cells
  12. Tissue Fluid Formation
  13. Transport Systems in Plants
  14. Plant Vascular Systems
  15. Plant Transport of Water
  16. Plant Adaptations to Water
  17. Translocation
  1. Communicable Diseases
  2. Plant Defences Against Pathogens
  3. Non-Specific Defences in Animals
  4. White Blood Cells and Secondary Defences
  5. The Primary and Secondary Immune Response
  6. Immunity
  7. Antibodies
  8. Autoimmune Diseases
  9. Vaccination and Epidemics
  10. Developing New Medicines
  11. Antibiotics and Their Use
  12. Biodiversity
  13. Conserving Biodiversity
  14. Measuring Biodiversity
  15. Measuring Genetic Biodiversity
  16. Variation
  17. Causes of Variation
  18. Adaptations
  19. Natural Selection
  20. Evolution and Speciation
  21. Evidence for Natural Selection
  22. Charles Darwin and Alfred Russel Wallace
  23. Classification and Phylogenetics

Please note that these free OCR A Level Biology revision notes are for personal study use only. Not to be copied, redistributed, or sold. While accuracy has been checked, STEMpathy cannot guarantee absolute completeness. Always refer to the official OCR specification and other authoritative sources.

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