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Below you will find our collection of revision notes and video tutorials. For the best revision experience, use both the notes and the videos at the same time to help you follow along. All resources are updated for the latest AQA 9-1 Biology specification.
Revision Resources
- Flashcards by Collins
- Revision notes by S-cool
Revision Notes
Paper 1 Video Tutorials
Cell Biology
- Eukaryotes and Prokaryotes
- Sizes of cells
- Order of magnitude
- Animal cells
- Plant cells
- Animal cell specialisation
- Plant cell specialisation
- Required practical 1: Microscopes
- Microscopy
- Bacterial division
- Required practical 2: Culturing
- Cell division by mitosis
- Stem cells
- Diffusion
- Surface area to volume ratio
- Osmosis
- Required practical 3: Effects of osmosis on plant tissue
- Active transport
Organisation
- The digestive system
- Digestive enzymes
- Effect of temperature and pH on enzymes
- Required practical 4: Food tests
- Required practical 5: Effect of pH on amylase
- Absorption in the intestine
- The heart and circulation
- Arteries, veins and capillaries
- The blood
- Cardiovascular diseases
- Gas exchange in the lungs
- Cancer
- Correlating risk factors
- Lifestyle and disease
- Plant tissues
- Transpiration
Infectious Diseases
- Communicable and non-communicable disease
- Pathogens
- Measles and HIV
- Salmonella and gonorrhoea
- Malaria
- Non-specific defense systems
- The immune system
- Plant diseases
- Vaccination
- Antibiotics
- Testing medicines
- Monoclonal antibodies
- Uses of monoclonal antibodies
- Plant diseases 2
- Plant defence responses
Bioenergetics
- Photosynthesis
- Uses of glucose from photosynthesis
- Required practical 6: Photosynthesis
- Limiting factors
- Respiration
- Exercise
- Metabolism
Required Practicals
Paper 2 Video Tutorials
Inheritance
- Sexual and asexual reproduction
- Meiosis and fertilisation
- Advantages and disadvantages of sexual and asexual reproduction
- DNA and the genome
- DNA structure
- Protein synthesis
- Mutations
- Alleles
- Cystic fibrosis
- Polydactyly
- Family trees
- Inheritance of sex
Variation and evolution
- Variation
- Evolution by natural selection
- Selective breeding
- Genetic engineering
- Cloning plants
- Cloning animals
- Darwin and natural selection
- Speciation
- Mendel and genetics
- Evidence for evolution - fossils
- Resistant bacteria
- Classification
Homeostasis
- Homeostasis
- The nervous system
- Required practical 7: Reaction time
- The brain
- The eye
- How the eye focuses
- Thermoregulation
- The endocrine system
- Control of blood glucose concentration
- The kidneys
- Maintaining the body's water balance
- The menstrual cycle
- Contraception
- Hormones to treat infertility
- Negative feedback
- Plant hormones
- Required practical 8: Plant responses
- Uses of plant hormones
Ecology
- Competition and interdepenence
- Biotic and abiotic factors
- Adapatations
- Food chains and predator-prey cycles
- Sampling organisms
- Required practical 9: Sampling organisms
- Mean, median and mode
- The carbon cycle
- The water cycle
- Decomposition
- Required practical 10: decay
- Environmental change
- Biodiversity
- Waste management
- Land use
- Global warming
- Maintaining biodiversity
- Trophic levels
- Pyramids of biomass
- Food security
- Modern farming methods
- Sustainable fisheries
- Role of biotechnology