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AQA A-level Biology questions by topic

Our topic questions for AQA A-level Biology (7402), sorted under the sections of AQA’s Biology specification in the order it prints them. Every question is original, with a point-by-point mark scheme, and every set has a printable PDF.

Other specifications: OCR A-level Biology A · Cambridge A-level Biology · Edexcel A-level Biology A · Edexcel A-level Biology B · every topic, by unit

3.1 Biological molecules180 questions11 topics

• Carbohydrate structure and function22 questions · 73 marks · 3.1.1, 3.1.2 · PDF, 80 KB
• Protein structure and function15 questions · 49 marks · 3.1.1, 3.1.4.1 · PDF, 54 KB
• DNA and RNA structure15 questions · 48 marks · 3.1.1, 3.1.5.1 · PDF, 72 KB
• Lipids: triglycerides, phospholipids and ester bonds15 questions · 44 marks · 3.1.1, 3.1.3 · PDF, 53 KB
• Enzyme action and specificity15 questions · 48 marks · 3.1.4.2 · PDF, 74 KB
• Factors affecting enzyme rate: temperature, pH and concentration18 questions · 60 marks · 3.1.4.2 · PDF, 57 KB
• Enzyme inhibition and metabolic control15 questions · 49 marks · 3.1.4.2 · PDF, 74 KB
• Eukaryotic cell structure and organelles20 questions · 61 marks · 3.1.5.1 · PDF, 55 KB
• DNA replication15 questions · 48 marks · 3.1.5.2 · PDF, 75 KB
• Glycolysis, ATP and the link reaction15 questions · 47 marks · 3.1.6 part only; the rest is A-level · PDF, 55 KB
• Water and inorganic ions15 questions · 46 marks · 3.1.7, 3.1.8 · PDF, 51 KB

3.2 Cells193 questions11 topics

• Eukaryotic cell structure and organelles20 questions · 61 marks · 3.2.1.1 · PDF, 55 KB
• Cell specialisation and biological organisation18 questions · 58 marks · 3.2.1.1 part only; the rest is A-level · PDF, 56 KB
• Prokaryotic cells and viruses21 questions · 64 marks · 3.2.1.2, 3.2.2 · PDF, 80 KB
• Microscopy, magnification and resolution15 questions · 48 marks · 3.2.1.3 · PDF, 49 KB
• The cell cycle and mitosis17 questions · 57 marks · 3.2.2 · PDF, 55 KB
• Membrane structure and the fluid mosaic model15 questions · 48 marks · 3.2.3 · PDF, 51 KB
• Diffusion and osmosis15 questions · 51 marks · 3.2.3 · PDF, 55 KB
• Active transport, co-transport and bulk transport15 questions · 48 marks · 3.2.3 · PDF, 77 KB
• Pathogens and non-specific defences21 questions · 71 marks · 3.2.4 · PDF, 59 KB
• The specific immune response17 questions · 61 marks · 3.2.4 · PDF, 53 KB
• Antibodies, vaccination and the four kinds of immunity19 questions · 67 marks · 3.2.4 · PDF, 79 KB

3.3 Organisms exchange substances with their environment222 questions13 topics

• Surface area to volume ratio: why size limits diffusion15 questions · 48 marks · 3.3.1 · PDF, 76 KB
• Gas exchange in mammals: lungs and ventilation26 questions · 96 marks · 3.3.2 · PDF, 86 KB
• Gas exchange in insects, fish and plants18 questions · 56 marks · 3.3.2 · PDF, 58 KB
• Transpiration and stomatal control15 questions · 50 marks · 3.3.2, 3.3.4.2 · PDF, 72 KB
• Digestion and absorption in the human gut15 questions · 53 marks · 3.3.3 · PDF, 52 KB
• Active transport, co-transport and bulk transport15 questions · 48 marks · 3.3.3 · PDF, 77 KB
• Haemoglobin and oxygen dissociation curves15 questions · 51 marks · 3.3.4.1 · PDF, 51 KB
• The heart and cardiac cycle15 questions · 50 marks · 3.3.4.1 part only; the rest is A-level · PDF, 71 KB
• Blood vessels, tissue fluid and lymph15 questions · 51 marks · 3.3.4.1 · PDF, 74 KB
• Cholesterol, atheroma and what a risk factor means15 questions · 59 marks · 3.3.4.1 · PDF, 75 KB
• Diet, energy and how to read a health claim20 questions · 73 marks · 3.3.4.1 · PDF, 82 KB
• Xylem and the transpiration stream23 questions · 73 marks · 3.3.4.2 · PDF, 84 KB
• Phloem translocation and the mass-flow hypothesis15 questions · 48 marks · 3.3.4.2 · PDF, 75 KB

3.4 Genetic information, variation and relationships between organisms219 questions13 topics

• The genetic code and transcription15 questions · 49 marks · 3.4.1, 3.4.2 · PDF, 54 KB
• DNA and RNA structure15 questions · 48 marks · 3.4.1 · PDF, 72 KB
• Prokaryotic cells and viruses21 questions · 64 marks · 3.4.1 · PDF, 80 KB
• Eukaryotic cell structure and organelles20 questions · 61 marks · 3.4.1 · PDF, 55 KB
• Translation and protein synthesis15 questions · 51 marks · 3.4.2 · PDF, 76 KB
• Meiosis and the sources of genetic variation18 questions · 59 marks · 3.4.3 · PDF, 58 KB
• DNA replication15 questions · 48 marks · 3.4.3 · PDF, 75 KB
• Natural selection: variation, selection and allele frequency15 questions · 49 marks · 3.4.3, 3.4.4 · PDF, 56 KB
• Evidence for evolution, resistance and genetic drift25 questions · 85 marks · 3.4.4 part only; the rest is A-level · PDF, 68 KB
• Classification, phylogeny and molecular evidence15 questions · 50 marks · 3.4.5, 3.4.7 · PDF, 53 KB
• Speciation and reproductive isolation15 questions · 53 marks · 3.4.5 part only; the rest is A-level · PDF, 80 KB
• Measuring biodiversity15 questions · 52 marks · 3.4.6, 3.4.7 part only; the rest is A-level · PDF, 72 KB
• Averages, spread and the null hypothesis15 questions · 50 marks · 3.4.7 · PDF, 54 KB

3.5 Energy transfers in and between organisms (A-level only)132 questions7 topics

• Chloroplast structure and the light-dependent reactions18 questions · 60 marks · 3.5.1 · PDF, 58 KB
• The Calvin cycle26 questions · 96 marks · 3.5.1 · PDF, 62 KB
• Limiting factors and primary productivity25 questions · 96 marks · 3.5.1, 3.5.3 · PDF, 87 KB
• Glycolysis, ATP and the link reaction15 questions · 47 marks · 3.5.2 · PDF, 55 KB
• The Krebs cycle and oxidative phosphorylation15 questions · 54 marks · 3.5.2 · PDF, 56 KB
• Anaerobic respiration and the respiratory quotient18 questions · 63 marks · 3.5.2 · PDF, 55 KB
• Nutrient cycles: nitrogen, phosphorus and eutrophication15 questions · 53 marks · 3.5.4 · PDF, 54 KB

3.6 Organisms respond to changes in their internal and external environments (A-level only)202 questions12 topics

• Plant responses: tropisms, auxins and the classic experiments23 questions · 77 marks · 3.6.1.1 · PDF, 65 KB
• Receptors: transduction and the reflex arc21 questions · 76 marks · 3.6.1.1, 3.6.1.2 · PDF, 64 KB
• Averages, spread and the null hypothesis15 questions · 50 marks · 3.6.1.1 · PDF, 54 KB
• The heart and cardiac cycle15 questions · 50 marks · 3.6.1.3 · PDF, 71 KB
• The action potential and its propagation16 questions · 56 marks · 3.6.2.1 · PDF, 74 KB
• The synapse: transmission, and why it runs one way19 questions · 65 marks · 3.6.2.2 · PDF, 58 KB
• Muscles and movement: the sliding-filament model15 questions · 53 marks · 3.6.2.2, 3.6.3 · PDF, 53 KB
• Hormonal communication and negative feedback15 questions · 48 marks · 3.6.4.1, 3.6.4.2 · PDF, 54 KB
• Regulation of blood glucose and diabetes mellitus15 questions · 57 marks · 3.6.4.1, 3.6.4.2 · PDF, 74 KB
• Factors affecting enzyme rate: temperature, pH and concentration18 questions · 60 marks · 3.6.4.1 · PDF, 57 KB
• Thermoregulation in endotherms and ectotherms15 questions · 50 marks · 3.6.4.1 · PDF, 54 KB
• Osmoregulation and kidney function15 questions · 54 marks · 3.6.4.3 · PDF, 74 KB

3.7 Genetics, populations, evolution and ecosystems (A-level only)212 questions12 topics

• Monohybrid inheritance and genetic diagrams21 questions · 74 marks · 3.7.1 · PDF, 55 KB
• Dihybrid inheritance, linkage, epistasis and the chi-squared test15 questions · 49 marks · 3.7.1 · PDF, 77 KB
• Averages, spread and the null hypothesis15 questions · 50 marks · 3.7.1 · PDF, 54 KB
• Population genetics and Hardy-Weinberg equilibrium15 questions · 50 marks · 3.7.2 · PDF, 56 KB
• Populations and their limits15 questions · 54 marks · 3.7.2, 3.7.4 · PDF, 54 KB
• Natural selection: variation, selection and allele frequency15 questions · 49 marks · 3.7.3 · PDF, 56 KB
• Evidence for evolution, resistance and genetic drift25 questions · 85 marks · 3.7.3 · PDF, 68 KB
• Speciation and reproductive isolation15 questions · 53 marks · 3.7.3 · PDF, 80 KB
• Meiosis and the sources of genetic variation18 questions · 59 marks · 3.7.3 · PDF, 58 KB
• Succession and environmental change28 questions · 99 marks · 3.7.4 · PDF, 93 KB
• Measuring biodiversity15 questions · 52 marks · 3.7.4 · PDF, 72 KB
• Conservation in situ and ex situ15 questions · 55 marks · 3.7.4 · PDF, 54 KB

3.8 The control of gene expression (A-level only)121 questions7 topics

• Mutation, gene expression and cancer21 questions · 75 marks · 3.8.1, 3.8.2.1, 3.8.2.2, 3.8.2.3 · PDF, 82 KB
• The genetic code and transcription15 questions · 49 marks · 3.8.1 · PDF, 54 KB
• Stem cells and cell potency15 questions · 51 marks · 3.8.2.1 · PDF, 53 KB
• Cell specialisation and biological organisation18 questions · 58 marks · 3.8.2.1 · PDF, 56 KB
• Control of gene expression15 questions · 53 marks · 3.8.2.2, 3.8.2.3 · PDF, 52 KB
• Genome analysis, genetic screening and gene therapy15 questions · 53 marks · 3.8.3, 3.8.4.1, 3.8.4.2, 3.8.4.3 · PDF, 53 KB
• Recombinant DNA technology22 questions · 80 marks · 3.8.4.1, 3.8.4.3 · PDF, 63 KB

A topic is listed under every section its lesson teaches, so some appear more than once. The codes beside each one are the specification headings it covers in that section.

The sections and codes are AQA’s, so check the current specification when a mark depends on one. The 7401/7402 route map lists every heading, with the lessons that teach it.