OCR A Level Biology Textbook

Clear explanations, diagrams and worked examples for every topic.

Our OCR A Level Biology textbook goes deeper than revision notes. Our topics include detailed explanations, diagrams, and worked examples – all aligned to the OCR A specification and up-to-date. Buy individual topics or save with bundles.

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OCR A Level Biology Textbook Phagocytosis

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  • Detailed explanations – not just what, but why
  • Clear diagrams and visuals
  • Worked examples and calculations
  • Detailed, yet concise, summary tables
  • Fully aligned to OCR A specification
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ocr a level biology enzymes
ocr a level biology textbook

This is a sample from our Enzymes topic. Every topic follows the same format – clear explanations, detailed diagrams and tables to help you understand, not just memorise.

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Individual topics from £1.99. Save over 80% with year bundle.

Year 12 Textbook Bundle
  1. Textbook: Microscopy — £1.99
  2. Textbook: Using Microscopes — £1.99
  3. Textbook: Microscopy Calculations — £2.99
  4. Textbook: Preparing Microscope Slides — £1.99
  5. Textbook: Eukaryotic Cell Structure — £3.99
  6. Textbook: Prokaryotic Cell Structure — £0.00
  7. Textbook: Interpreting Micrographs — £3.99
  8. Textbook: Comparing Eukaryotic and Prokaryotic Cells — £2.99
  9. Textbook: Organelle Involvement in Protein Synthesis — £3.99
  10. Textbook: Water — £1.99
  11. Textbook: Introduction to Macromolecules — £1.99
  12. Textbook: Carbohydrates — £3.99
  13. Textbook: Lipids — £3.99
  14. Textbook: Proteins — £3.99
  15. Textbook: Inorganic Ions — £0.00
  16. Textbook: Chemical Tests for Biomolecules — £2.99
  17. Textbook: Colorimetry — £3.99
  18. Textbook: Chromatography — £2.99
  19. Textbook: Nucleotides and Nucleic Acids — £3.99
  20. Textbook: DNA Replication — Original price was: £3.99.Current price is: £0.00.
  21. Textbook: Genetic Code — £2.99
  22. Textbook: Protein Synthesis — £3.99
  23. Textbook: Enzymes — £3.99
  24. Textbook: Cofactors and Inhibitors — £3.99
  25. Textbook: Factors Affecting Enzyme Activity — £3.99
  26. Textbook: Biological Membranes — £3.99
  27. Textbook: Transport Across Membranes — £3.99
  28. Textbook: Water Potential and Osmosis — £3.99
  29. Textbook: Eukaryotic Cell Cycle — £2.99
  30. Textbook: Mitosis and Cytokinesis — £2.99
  31. Textbook: Meiosis — £2.99
  32. Textbook: Stem Cells — £2.99
  33. Textbook: Organisation in Animals — £1.99
  34. Textbook: Organisation in Plants — £1.99
  1. Textbook: Exchange Surfaces — £3.99
  2. Textbook: Observing Exchange Surfaces — £3.99
  3. Textbook: Mammalian Gaseous Exchange System — £3.99
  4. Textbook: Mammalian Ventilation — £3.99
  5. Textbook: Oxygen Uptake in Mammals — £3.99
  6. Textbook: Measuring Oxygen Uptake in Mammals — £3.99
  7. Textbook: Ventilation and Gas Exchange in Gills — £3.99
  8. Textbook: Ventilation and Gas Exchange in Insects — £2.99
  9. Textbook: Comparing Gas Exchange Systems — £2.99
  10. Textbook: Transport Systems in Animals — £3.99
  11. Textbook: Blood Vessels — £2.99
  12. Textbook: The Heart — £3.99
  13. Textbook: Coordination of the Cardiac Cycle — £3.99
  14. Textbook: Erythrocytes and Oxygen Transport — £3.99
  15. Textbook: Carbon Dioxide — £3.99
  16. Textbook: Tissue Fluid Formation — £3.99
  17. Textbook: The Need for Transport Systems in Plants — £1.99
  18. Textbook: Plant Vascular Systems — £3.99
  19. Textbook: Interpreting Photomicrographs of Plant Tissue — £3.99
  20. Textbook: Plant Transport of Water — £3.99
  21. Textbook: Plant Adaptations to Water — £2.99
  22. Textbook: Translocation — £3.99
  1. Textbook: Communicable Diseases — £3.99
  2. Textbook: Plant Defences Against Pathogens — £3.99
  3. Textbook: Non-Specific Defences in Animals — £3.99
  4. Textbook: Introduction to White Blood Cells — £3.99
  5. Textbook: Secondary Defences — £3.99
  6. Textbook: B and T Lymphocytes — £3.99
  7. Textbook: The Primary and Secondary Immune Response — £1.99
  8. Textbook: Immunity — £2.99
  9. Textbook: Antibodies — £3.99
  10. Textbook: Autoimmune Diseases — £2.99
  11. Textbook: Vaccination and Epidemics — £3.99
  12. Textbook: Developing New Medicines — £3.99
  13. Textbook: Antibiotics and Their Use — £3.99
  14. Textbook: Biodiversity — £1.99
  15. Textbook: Human Impact on Biodiversity — £1.99
  16. Textbook: Conserving Biodiversity — £3.99
  17. Textbook: Conservation Agreements — £1.99
  18. Textbook: Measuring Biodiversity — £3.99
  19. Textbook: Calculating Biodiversity — £3.99
  20. Textbook: Measuring Genetic Biodiversity — £3.99
  21. Textbook: Variation — £3.99
  22. Textbook: Causes of Variation — £3.99
  23. Textbook: Adaptations — £3.99
  24. Textbook: Natural Selection — £3.99
  25. Textbook: Evolution and Speciation — £3.99
  26. Textbook: Evidence for Natural Selection — £3.99
  27. Textbook: Charles Darwin and Alfred Russel Wallace — £1.99
  28. Textbook: Classification — £2.99
  29. Textbook: Phylogenetics — £1.99
  1. Textbook: The Need for Communication Systems — £2.99
  2. Textbook: Introduction to Communication Systems — £1.99
  3. Textbook: Homeostasis and Feedback Systems — £3.99
  4. Textbook: Thermoregulation: Ectothermy and Endothermy — £2.99
  5. Textbook: The Importance of Excretion — £2.99
  6. Textbook: Functions of the Liver — £3.99
  7. Textbook: Liver Anatomy and Histology — £3.99
  8. Textbook: Interpreting Photomicrographs of the Liver — £1.99
  9. Textbook: Kidney Anatomy and Histology — £2.99
  10. Textbook: Kidney Nephrons: Filtering the Blood — £3.99
  11. Textbook: Osmoregulation: The Collecting Duct and ADH — £3.99
  12. Textbook: Interpreting Photomicrographs of the Kidney — £1.99
  13. Textbook: Kidney Failure — £2.99
  14. Textbook: Urine Analysis — £1.99
  15. Textbook: Introduction to the Nervous System — £1.99
  16. Textbook: Principles of Neuronal Communication — £3.99
  17. Textbook: Sensory Receptors — £2.99
  18. Textbook: Neurones — £2.99
  19. Textbook: Nerve Impulses — £3.99
  20. Textbook: Myelinated and Unmyelinated Neurones — £3.99
  21. Textbook: Introduction to Synapses — £1.99
  22. Textbook: Synaptic Action — £2.99
  23. Textbook: Introduction to the Endocrine System — £2.99
  24. Textbook: Principles of Hormonal Communication — £2.99
  25. Textbook: Hormones: Types and Mechanisms — £3.99
  26. Textbook: Adrenal Glands — £2.99
  27. Textbook: Pancreas Anatomy and Histology — £3.99
  28. Textbook: Control of Blood Glucose — £3.99
  29. Textbook: Diabetes Mellitus — £1.99
  30. Textbook: Treating Diabetes — £2.99
  31. Textbook: Introduction to Plant Responses — £1.99
  32. Textbook: Types of Plant Responses — £2.99
  33. Textbook: Plant Responses to Herbivory — £1.99
  34. Textbook: Principles of Plant Coordination — £2.99
  35. Textbook: The Roles of Plant Hormones — £1.99
  36. Textbook: Hormonal Control of Shoot and Root Elongation — £3.99
  37. Textbook: Hormonal Control of Stem Elongation — £2.99
  38. Textbook: Hormonal Control of Seed Germination — £2.99
  39. Textbook: Hormonal Control of Apical Dominance — £2.99
  40. Textbook: Hormonal Control of Leaf Loss — £0.49
  41. Textbook: Hormonal Control of Stress Responses — £1.99
  42. Textbook: Commercial Uses of Plant Hormones — £1.99
  43. Textbook: Communication Systems in Animals — £1.99
  44. Textbook: The Mammalian Nervous System — £2.99
  45. Textbook: The Central Nervous System — £2.99
  46. Textbook: The Peripheral Nervous System — £2.99
  47. Textbook: Reflexes — £1.99
  48. Textbook: Controlling Heart Rate — £2.99
  49. Textbook: The Fight or Flight Response — £1.99
  50. Textbook: Mammalian Muscle Structure — £3.99
  51. Textbook: Neuronal Control of Striated Muscle — £1.99
  52. Textbook: Myofibrils and the Sliding Filament Theory — £3.99
  53. Textbook: How Muscles Contract — £2.99
  54. Textbook: Importance of ATP in Muscle Contraction — £1.99
  55. Textbook: Photosynthesis and Chloroplasts — £2.99
  56. Textbook: Photosystems and the Electron Transport Chain — £2.99
  57. Textbook: The Light-Dependent Reactions — £2.99
  58. Textbook: The Light-Independent Reactions — £2.99
  59. Textbook: Uses of Triose Phosphate — £1.99
  60. Textbook: Photosynthetic Pigments in Plants — £2.99
  61. Textbook: Factors Affecting the Rate of Photosynthesis — £3.99
  62. Textbook: Thin-Layer Chromatography of Plant Pigments — £1.99
  63. Textbook: Introduction to Respiration — £2.99
  64. Textbook: Mitochondria Structures and Functions — £2.99
  65. Textbook: Glycolysis — £2.99
  66. Textbook: The Link Reaction — £1.99
  67. Textbook: The Krebs Cycle — £2.99
  68. Textbook: The Importance of Coenzymes in Cellular Respiration — £1.99
  69. Textbook: Oxidative Phosphorylation and Chemiosmosis — £2.99
  70. Textbook: Anaerobic Respiration — £2.99
  71. Textbook: Respiratory Substrates — £1.99
  72. Textbook: Respiratory Quotient — £1.99
  73. Textbook: The Interrelationship between Photosynthesis and Respiration — £2.99
  74. Textbook: Factors Affecting the Rate of Respiration — £2.99
  75. Textbook: Investigating the Rate of Respiration — £2.99

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