Biology › Revision posters

A-level Biology revision posters

One page per topic, with the key diagrams, processes and points to remember. Print them for your wall or save them to your phone. Each title links to the lesson the poster comes from.

Scientific method and quantitative biology

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  Variables and controls: what an experiment can showDownload
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  Handling data: units, scales, rates and uncertaintyDownload
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  Averages, spread and the null hypothesisDownload
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  Choosing, carrying out and concluding a statistical testDownload

Cells, microscopy and biological organisation

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  Eukaryotic cell structure and organellesDownload
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  Microscopy, magnification and resolutionDownload
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  Prokaryotic cells and virusesDownload
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  Cell specialisation and biological organisationDownload
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  Plan diagrams and tissue sectionsDownload

Biological molecules, water and inorganic ions

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  Carbohydrate structure and functionDownload
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  Lipids: triglycerides, phospholipids and ester bondsDownload
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  Water and inorganic ionsDownload
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  Protein structure and functionDownload

Enzymes and metabolic control

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  Enzyme action and specificityDownload
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  Factors affecting enzyme rate: temperature, pH and concentrationDownload
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  Enzyme inhibition and metabolic controlDownload
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  Cofactors, coenzymes and where enzymes workDownload

Membranes and transport across cells

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  Membrane structure and the fluid mosaic modelDownload
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  Diffusion and osmosisDownload
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  Active transport, co-transport and bulk transportDownload

Nucleic acids, genomes and protein synthesis

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  DNA and RNA structureDownload
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  DNA replicationDownload
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  The genetic code and transcriptionDownload
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  Translation and protein synthesisDownload

Cell cycles, reproduction and development

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  The cell cycle and mitosisDownload
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  Stem cells and cell potencyDownload
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  Gametes, fertilisation and early developmentDownload
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  Sexual reproduction in flowering plantsDownload
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  Homeobox genes, Hox genes and apoptosisDownload
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  Cloning in plants and animalsDownload

Exchange surfaces and gas exchange

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  Surface area to volume ratio: why size limits diffusionDownload
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  Gas exchange in mammals: lungs and ventilationDownload
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  Gas exchange in insects, fish and plantsDownload

Plant transport and mineral nutrition

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  Xylem and the transpiration streamDownload
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  Transpiration and stomatal controlDownload
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  Phloem translocation and the mass-flow hypothesisDownload

Animal transport and cardiovascular biology

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  The heart and cardiac cycleDownload
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  Blood vessels, tissue fluid and lymphDownload
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  Haemoglobin and oxygen dissociation curvesDownload

Nutrition, digestion and health evidence

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  Digestion and absorption in the human gutDownload
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  Diet, energy and how to read a health claimDownload
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  Cholesterol, atheroma and what a risk factor meansDownload

Pathogens, disease and immunity

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  Pathogens and non-specific defencesDownload
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  The specific immune responseDownload
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  Antibodies, vaccination and the four kinds of immunityDownload
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  Infectious disease: transmission and controlDownload
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  Plant disease and plant defencesDownload

Respiration and cellular energy

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  Glycolysis, ATP and the link reactionDownload
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  The Krebs cycle and oxidative phosphorylationDownload
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  Anaerobic respiration and the respiratory quotientDownload
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  Exercise, sports medicine and performance-enhancing drugsDownload

Photosynthesis and primary productivity

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  Chloroplast structure and the light-dependent reactionsDownload
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  The Calvin cycleDownload
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  Limiting factors and primary productivityDownload

Nervous coordination, receptors and muscles

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  Organisation of the nervous systemDownload
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  Receptors: transduction and the reflex arcDownload
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  The action potential and its propagationDownload
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  The synapse: transmission, and why it runs one wayDownload
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  Muscles and movement: the sliding-filament modelDownload
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  Brain imaging, development and learningDownload

Hormonal communication, plant responses and homeostasis

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  Hormonal communication and negative feedbackDownload
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  Regulation of blood glucose and diabetes mellitusDownload
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  Osmoregulation and kidney functionDownload
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  The liver: detoxification, deamination and the making of ureaDownload
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  Thermoregulation in endotherms and ectothermsDownload
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  Plant responses: tropisms, auxins and the classic experimentsDownload

Inheritance and population genetics

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  Meiosis and the sources of genetic variationDownload
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  Monohybrid inheritance and genetic diagramsDownload
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  Dihybrid inheritance, linkage, epistasis and the chi-squared testDownload
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  Population genetics and Hardy-Weinberg equilibriumDownload

Gene regulation, genomics and biotechnology

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  Control of gene expressionDownload
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  Mutation, gene expression and cancerDownload
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  Recombinant DNA technologyDownload
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  Genome analysis, genetic screening and gene therapyDownload
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  Industrial biotechnology and fermentationDownload
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  Pharming, recombinant medicines and synthetic biologyDownload

Classification, biodiversity and conservation

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  Classification, phylogeny and molecular evidenceDownload
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  The five kingdoms, species concepts and virusesDownload
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  Measuring biodiversityDownload
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  Conservation in situ and ex situDownload

Evolution and speciation

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  Natural selection: variation, selection and allele frequencyDownload
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  Evidence for evolution, resistance and genetic driftDownload
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  Speciation and reproductive isolationDownload
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  Continuous and discontinuous variationDownload
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  Artificial selection and selective breedingDownload

Ecology, populations and environmental change

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  Populations and their limitsDownload
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  Nutrient cycles: nitrogen, phosphorus and eutrophicationDownload
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  Succession and environmental changeDownload
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  The carbon cycle and climate changeDownload
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  Managing ecosystems sustainablyDownload

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