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A-level biology questions by topic
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Answer and mark each question
1,545 questions worth 5,244 marks: original questions written for this library; none is taken from a past paper. Write your answer on paper before opening the mark scheme.
Award one mark for each listed point and record the score.
How questions are rescheduled
Questions come back by topic. The marks you award set the gap before the topic comes back. Full marks widen it, half marks keep it, and fewer bring it back sooner.
No marks cuts the gap to about a fifth. The longest gap is about six months. Answers from one topic on the same day count as the lowest of them. A question you missed is not set again while its topic has others you have not tried.
Quick checks
A quick check brings back a question you got right before. Do not write it all out: plan how you would answer it, the method and the key steps, then open the mark scheme and say whether your plan would have got the marks.
Got it, Partly and Missed it count as full, half and no marks. A quick check takes about a quarter of the time of a full answer.
Build a practice set
The first button starts up to 15 questions, or 10 from one unit or topic: questions you have not answered, one topic at a time with your weakest topics first, then one for each topic that is due. Filter by unit, topic, length or response type.
Timed sets contain 25, 50 or 85 marks and keep the mark schemes closed until the timer stops. Every question you mark counts towards its schedule, here or on Today.
Exam-board filter
With an exam board chosen, practice leaves out the questions your specification does not set: whole topics another board teaches, and single questions on detail only some boards ask for.
Choose All boards to include them. Your board is saved for Today and the card and question sessions too; All boards on this page changes this page only.
All 1,545 questions in the library, one at a time, with the mark scheme a tap away. Write your answer first, then mark yourself against what the scheme actually asks for; how it went sets when its topic comes back, with a question you have not tried or a quick check.
Once you choose your exam board, here or on Today, practice keeps to the questions your specification sets. All boards includes questions written for the other specifications.
Timed sets
A timed set selects text-based questions from your chosen topics and keeps the mark schemes hidden until you finish. It practises recall, written explanation and calculation. It does not include the full range of data analysis, micrographs, apparatus diagrams or extended tasks found in an exam paper, so use your board’s past papers for complete paper practice.
The timer uses 1.4 minutes per mark as a general pacing aid. It is not calibrated to every exam board and does not reproduce a full paper. Use your awarding organisation’s published paper duration when practising under examination conditions.
Every topic with questions
A topic with 4 or more questions links to its own page, where they are all set out with their schemes; a topic with fewer links to the questions at the foot of its lesson.
Scientific method and quantitative biologyUnit B0065 questions
- Variables and controls: what an experiment can show20 · 64 marks
- Handling data: units, scales, rates and uncertainty15 · 49 marks
- Averages, spread and the null hypothesis15 · 50 marks
- Choosing, carrying out and concluding a statistical test15 · 52 marks
Cells, microscopy and biological organisationUnit B0189 questions
- Eukaryotic cell structure and organelles20 · 61 marks
- Microscopy, magnification and resolution15 · 48 marks
- Prokaryotic cells and viruses21 · 64 marks
- Cell specialisation and biological organisation18 · 58 marks
- Plan diagrams and tissue sections15 · 47 marks
Biological molecules, water and inorganic ionsUnit B0267 questions
- Carbohydrate structure and function22 · 73 marks
- Lipids: triglycerides, phospholipids and ester bonds15 · 44 marks
- Water and inorganic ions15 · 46 marks
- Protein structure and function15 · 49 marks
Enzymes and metabolic controlUnit B0363 questions
- Enzyme action and specificity15 · 48 marks
- Factors affecting enzyme rate: temperature, pH and concentration18 · 60 marks
- Enzyme inhibition and metabolic control15 · 49 marks
- Cofactors, coenzymes and where enzymes work15 · 45 marks
Membranes and transport across cellsUnit B0445 questions
- Membrane structure and the fluid mosaic model15 · 48 marks
- Diffusion and osmosis15 · 51 marks
- Active transport, co-transport and bulk transport15 · 48 marks
Nucleic acids, genomes and protein synthesisUnit B0560 questions
- DNA and RNA structure15 · 48 marks
- DNA replication15 · 48 marks
- The genetic code and transcription15 · 49 marks
- Translation and protein synthesis15 · 51 marks
Cell cycles, reproduction and developmentUnit B0691 questions
- The cell cycle and mitosis17 · 57 marks
- Stem cells and cell potency15 · 51 marks
- Gametes, fertilisation and early development15 · 46 marks
- Sexual reproduction in flowering plants14 · 42 marks
- Homeobox genes, Hox genes and apoptosis15 · 45 marks
- Cloning in plants and animals15 · 51 marks
Exchange surfaces and gas exchangeUnit B0759 questions
- Surface area to volume ratio: why size limits diffusion15 · 48 marks
- Gas exchange in mammals: lungs and ventilation26 · 96 marks
- Gas exchange in insects, fish and plants18 · 56 marks
Plant transport and mineral nutritionUnit B0853 questions
- Xylem and the transpiration stream23 · 73 marks
- Transpiration and stomatal control15 · 50 marks
- Phloem translocation and the mass-flow hypothesis15 · 48 marks
Animal transport and cardiovascular biologyUnit B0945 questions
- The heart and cardiac cycle15 · 50 marks
- Blood vessels, tissue fluid and lymph15 · 51 marks
- Haemoglobin and oxygen dissociation curves15 · 51 marks
Nutrition, digestion and health evidenceUnit B1050 questions
- Digestion and absorption in the human gut15 · 53 marks
- Diet, energy and how to read a health claim20 · 73 marks
- Cholesterol, atheroma and what a risk factor means15 · 59 marks
Pathogens, disease and immunityUnit B1191 questions
- Pathogens and non-specific defences21 · 71 marks
- The specific immune response17 · 61 marks
- Antibodies, vaccination and the four kinds of immunity19 · 67 marks
- Infectious disease: transmission and control19 · 68 marks
- Plant disease and plant defences15 · 49 marks
Respiration and cellular energyUnit B1262 questions
- Glycolysis, ATP and the link reaction15 · 47 marks
- The Krebs cycle and oxidative phosphorylation15 · 54 marks
- Anaerobic respiration and the respiratory quotient18 · 63 marks
- Exercise, sports medicine and performance-enhancing drugs14 · 50 marks
Photosynthesis and primary productivityUnit B1369 questions
- Chloroplast structure and the light-dependent reactions18 · 60 marks
- The Calvin cycle26 · 96 marks
- Limiting factors and primary productivity25 · 96 marks
Nervous coordination, receptors and musclesUnit B14105 questions
- Organisation of the nervous system19 · 64 marks
- Receptors: transduction and the reflex arc21 · 76 marks
- The action potential and its propagation16 · 56 marks
- The synapse: transmission, and why it runs one way19 · 65 marks
- Muscles and movement: the sliding-filament model15 · 53 marks
- Brain imaging, development and learning15 · 55 marks
Hormonal communication, plant responses and homeostasisUnit B1598 questions
- Hormonal communication and negative feedback15 · 48 marks
- Regulation of blood glucose and diabetes mellitus15 · 57 marks
- Osmoregulation and kidney function15 · 54 marks
- The liver: detoxification, deamination and the making of urea15 · 52 marks
- Thermoregulation in endotherms and ectotherms15 · 50 marks
- Plant responses: tropisms, auxins and the classic experiments23 · 77 marks
Inheritance and population geneticsUnit B1669 questions
- Meiosis and the sources of genetic variation18 · 59 marks
- Monohybrid inheritance and genetic diagrams21 · 74 marks
- Dihybrid inheritance, linkage, epistasis and the chi-squared test15 · 49 marks
- Population genetics and Hardy-Weinberg equilibrium15 · 50 marks
Gene regulation, genomics and biotechnologyUnit B17114 questions
- Control of gene expression15 · 53 marks
- Mutation, gene expression and cancer21 · 75 marks
- Recombinant DNA technology22 · 80 marks
- Genome analysis, genetic screening and gene therapy15 · 53 marks
- Industrial biotechnology and fermentation24 · 84 marks
- Pharming, recombinant medicines and synthetic biology17 · 57 marks
Classification, biodiversity and conservationUnit B1861 questions
- Classification, phylogeny and molecular evidence15 · 50 marks
- The five kingdoms, species concepts and viruses16 · 57 marks
- Measuring biodiversity15 · 52 marks
- Conservation in situ and ex situ15 · 55 marks
Evolution and speciationUnit B1985 questions
- Natural selection: variation, selection and allele frequency15 · 49 marks
- Evidence for evolution, resistance and genetic drift25 · 85 marks
- Speciation and reproductive isolation15 · 53 marks
- Continuous and discontinuous variation15 · 48 marks
- Artificial selection and selective breeding15 · 53 marks
Ecology, populations and environmental changeUnit B20104 questions
- Populations and their limits15 · 54 marks
- Nutrient cycles: nitrogen, phosphorus and eutrophication15 · 53 marks
- Succession and environmental change28 · 99 marks
- The carbon cycle and climate change26 · 90 marks
- Managing ecosystems sustainably20 · 73 marks
1,545 questions worth 5,244 marks, every one original InkBiology material rather than past-paper text. Your progress is kept in this browser, on this device, unless you sign in.