1 Molecules of life
- Biomacromolecules
- Nucleic acids
- Cells
- Prokaryotic and eukaryotic cells
- Cellular organelles
- Proteins
- Enzymes
- Membranes
- Movement through membranes
- Energy and ATP
- Respiration
- Photosynthesis
- Export of macromolecules
- Scientific method

2 Detecting and responding
- Homeostasis
- Receptors-detecting change
- The nervous system
- A reflex arc
- Endocrine system
- Negative feedback
- Signalling molecules
- Signal transduction
- Temperature regulation in humans
- Water regulation
- Glucose regulation
- Calcium regulation
- Hormonal regulation in plants
- Parasites, pathogens and disease
- Plant defences
- Defences in humans
- The lymphatic system
- Non-specific immunity
- Blood clotting
- Specific immunity
- Humoral immunity
- Cell mediated immunity
- Autoimmune disease
- Hypersensitivities and allergies
- Control of disease

3 Preparing for the examination

4 Solutions to practice questions