A-Level Biology · Cambridge International · Pearson Edexcel · AQA · OCR · Equivalent A-Levels

Free A-Level Biology Practice, Built Like a Proper Syllabus

Begin with free topic-based Biology revision, structured questions, data interpretation, practical reasoning, and practice tests across all major A-Level domains, then move to premium timed, mock-exam-style practice when you need a larger question bank and worked solutions.

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Cambridge InternationalPearson EdexcelAQAOCREquivalent A-Levels
Free Biology Practice

Start With Free A-Level Biology Tests

Use the free version to begin immediately, practise one Biology topic at a time, diagnose weak areas, and strengthen biological knowledge, data interpretation, experimental design, molecular reasoning, systems analysis, and evidence-based evaluation.

  • No access code needed
  • Ten focused Biology topics
  • Targeted revision pathway
  • Start practising immediately
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Turn Practice Into Exam Confidence

1,000practice questions & exercises with worked solutions

Move beyond occasional revision into a complete preparation system covering the full A-Level Biology syllabus with timed, exam-style practice.

  • 1,000 practice questions
  • Worked solutions explanations
  • Timed exam-style practice
  • Full syllabus reinforcement
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One premium pathway. Ten Biology domains. One thousand opportunities to replace uncertainty with exam-ready confidence.

Course coverage

What the Free A-Level Biology Version Covers

Alternate between cell biology, biochemistry, genetics, physiology, energetics, ecology, and practical investigation so factual knowledge and biological reasoning develop together.

01 Cell Structure, Organisation, and Microscopy Build a strong A-Level Biology foundation by understanding cell types, ultrastructure, membrane organisation, microscopy, scale, and how cells combine into tissues and organ systems.
  • Prokaryotic and eukaryotic cells, including the structural differences that shape biological function
  • Common cell structures such as the cell surface membrane, cytoplasm, nucleus or nucleoid, and ribosomes
  • Comparative ultrastructure of bacterial, plant, and animal cells using labelled diagrams and electron micrographs
  • Specialised organelles including mitochondria, chloroplasts, rough and smooth endoplasmic reticulum, Golgi apparatus, lysosomes, vesicles, centrioles, and the cytoskeleton
  • Recognition and interpretation of organelles on electron micrographs, including scale bars, magnification, and size calculations
  • Fluid mosaic model of the cell surface membrane, including phospholipids, proteins, cholesterol, glycoproteins, and glycolipids
  • Biological drawings, microscopy calibration, and the levels of organisation from cells to organ systems
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02 Biological Molecules and Water Strengthen your understanding of the chemical basis of life through water, carbohydrates, lipids, proteins, nucleic acids, and the practical tests used to identify key biological molecules.
  • Properties of water including polarity, hydrogen bonding, cohesion, adhesion, solvent action, thermal buffering, and evaporative cooling
  • Monosaccharides, disaccharides, and polysaccharides, with attention to structure, bonding, and biological function
  • Alpha and beta glucose, glycosidic bonds, condensation and hydrolysis reactions, and storage versus structural carbohydrates
  • Triglycerides and phospholipids, including ester bonds, energy density, membrane roles, and the biological significance of insolubility
  • Protein structure from amino acids to quaternary structure, including globular and fibrous proteins and the causes of denaturation
  • DNA and RNA nucleotides, phosphodiester bonds, complementary base pairing, and the significance of the DNA double helix
  • Food tests such as Benedict’s, iodine, biuret, emulsion, and DCPIP, including controls, interpretation, and limitations
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03 Enzymes, Metabolism, and Cellular Energetics Prepare for enzyme and metabolism questions by studying catalytic specificity, reaction control, rate investigations, ATP, and the central role of energy transfer in living systems.
  • Enzyme structure and function, including active sites, specificity, and induced fit compared with lock-and-key thinking
  • Enzyme-substrate complexes, activation energy, and how enzymes make metabolic pathways possible
  • Effects of temperature, pH, substrate concentration, and enzyme concentration on the rate of enzyme-controlled reactions
  • Competitive inhibition, non-competitive inhibition, allosteric regulation, and feedback inhibition in biological systems
  • Planning and interpreting practical enzyme investigations using controls, repeats, anomalies, means, and suitable graph selection
  • ATP as the immediate energy currency of cells, including its structure and importance in energy coupling
  • Phosphorylation, energy transfer, and the way metabolism links anabolic and catabolic processes
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04 Cell Membranes, Transport, and Cell Communication Master how substances move across membranes and how cells communicate through receptors, signalling molecules, and coordinated responses.
  • Diffusion, osmosis, and net movement down concentration gradients in biological systems
  • Water potential, including solute potential and pressure potential where relevant to the specification
  • Osmosis in plant and animal cells, including plasmolysis, turgor, and the consequences of water movement
  • Facilitated diffusion through channel and carrier proteins, including specificity and saturation
  • Active transport, ATP-driven carrier proteins, and co-transport systems such as glucose absorption in the ileum
  • Bulk transport by endocytosis and exocytosis, including phagocytosis, pinocytosis, and vesicle-mediated movement
  • Cell signalling, receptors, ligands, second messengers, phosphorylation cascades, and recognition via glycoproteins
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05 DNA, Gene Expression, and Molecular Genetics Develop strong molecular biology understanding through DNA replication, transcription, translation, mutation, gene regulation, and the tools used in modern biotechnology.
  • DNA structure, antiparallel strands, phosphodiester backbones, base pairing, and semi-conservative replication
  • Roles of helicase, DNA polymerase, ligase, proofreading processes, and the sources of mutation
  • RNA types including mRNA, tRNA, and rRNA, together with the stages of transcription
  • Translation, the genetic code, ribosome function, tRNA anticodons, and peptide bond formation
  • Gene and chromosome mutations, including substitution, insertion, deletion, frameshift, duplication, inversion, and translocation
  • Gene regulation through promoters, transcription factors, enhancers, lac operon concepts, and basic epigenetic control where specified
  • Biotechnology tools such as restriction enzymes, ligase, plasmid and viral vectors, PCR, gel electrophoresis, and DNA profiling
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06 Cell Cycle, Cell Division, and Inheritance Cover the mechanisms of growth and reproduction while building confidence in meiosis, inheritance patterns, population genetics, and genetic variation.
  • The cell cycle, including interphase, DNA replication, mitosis, cytokinesis, and checkpoint control
  • Stages of mitosis and their importance in growth, tissue repair, and asexual reproduction
  • Stages of meiosis I and II, reduction division, crossing over, and independent assortment
  • Formation of gametes, fertilisation, and restoration of the diploid chromosome number
  • Genotype, phenotype, alleles, loci, dominance, codominance, incomplete dominance, and sex linkage
  • Dihybrid crosses, test crosses, pedigrees, and recombination where included on the syllabus
  • Hardy-Weinberg principle, allele frequencies, genotype frequencies, selection pressures, and changes in populations over time
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07 Gas Exchange, Transport Systems, and Homeostasis Study how organisms exchange materials, move substances, and maintain stable internal conditions through coordinated transport and control systems.
  • Features of efficient exchange surfaces, including large surface area, short diffusion distance, ventilation, and circulation
  • Mammalian gas exchange with the trachea, bronchi, bronchioles, alveoli, and ventilation mechanics
  • Blood components, haemoglobin structure, oxygen dissociation curves, the Bohr effect, and carbon dioxide transport
  • Heart structure, cardiac cycle, arteries, veins, capillaries, tissue fluid formation, and the lymphatic system
  • Plant transport through xylem and phloem, including the cohesion-tension mechanism and source-sink relationships
  • Core principles of homeostasis, including receptors, effectors, control centres, and negative feedback
  • Thermoregulation, blood glucose regulation, insulin, glucagon, and the role of the liver in balance maintenance
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08 Immunity, Disease, and Organismal Responses Prepare for biological response questions by learning about pathogens, immunity, vaccination, coordination, and the body’s responses to changing conditions and disease.
  • Pathogens including bacteria, viruses, fungi, and protoctists, with transmission routes and disease overview
  • Antibiotics, antivirals, and the development of antibiotic resistance through selection pressure
  • Non-specific defences such as skin, mucous membranes, inflammation, and phagocytosis
  • Specific immunity involving lymphocytes, clonal selection, clonal expansion, antigens, and antibodies
  • Antibody action including neutralisation, agglutination, and opsonisation, plus T-cell roles where specified
  • Vaccination, active and passive immunity, herd immunity, allergies, autoimmune ideas, and histamine overview where relevant
  • Nervous and hormonal coordination, including neurones, synapses, endocrine control, and integrated homeostatic responses
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09 Photosynthesis, Respiration, and Ecosystem Energy Flow Link cellular energetics to whole-ecosystem processes by mastering photosynthesis, respiration, productivity, and the transfer of energy through food systems.
  • Chloroplast structure, thylakoids, grana, stroma, and the organisation of photosynthetic reactions
  • Light-dependent reactions, including photolysis, electron transport, photophosphorylation, and NADP reduction
  • The Calvin cycle, including carboxylation by Rubisco, reduction, regeneration of RuBP, and limiting factors
  • Experimental approaches to photosynthesis, including indicator-based and practical investigations where relevant
  • Respiration pathways including glycolysis, link reaction, Krebs cycle, and oxidative phosphorylation
  • Aerobic and anaerobic respiration, mitochondrial structure, ATP production, and respiratory quotient where specified
  • Food chains, food webs, trophic levels, productivity, ecological efficiency, and interpretation of biomass and energy pyramids
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10 Ecology, Evolution, and Practical/Experimental Skills Finish with the wider biological picture by studying populations, biodiversity, nutrient cycles, evolution, conservation, and the practical techniques needed for strong exam performance.
  • Ecological sampling using quadrats, transects, random methods, and mark-release-recapture techniques
  • Population estimation, sampling bias, Simpson’s index of diversity, and the interpretation of ecological data
  • Carbon and nitrogen cycles, decomposition, saprotroph activity, and factors affecting decay rates
  • Natural selection, stabilising, directional, and disruptive selection, plus speciation concepts and genetic drift where included
  • Evidence for evolution from fossils, molecular data, and comparative anatomy
  • Human impacts such as habitat loss, pollution, climate change, eutrophication, and the value of biodiversity conservation
  • Planning investigations, controlling variables, risk assessment, graphing, data handling, statistical awareness, and evaluation of methods
Start Section 10 Free →
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Choose a Free Biology Practice Section

Each free section opens in a new tab. Premium Biology practice is available separately and requires an access code.

01Cell Structure, Organisation, and Microscopy 02Biological Molecules and Water 03Enzymes, Metabolism, and Cellular Energetics 04Cell Membranes, Transport, and Cell Communication 05DNA, Gene Expression, and Molecular Genetics 06Cell Cycle, Cell Division, and Inheritance 07Gas Exchange, Transport Systems, and Homeostasis 08Immunity, Disease, and Organismal Responses 09Photosynthesis, Respiration, and Ecosystem Energy Flow 10Ecology, Evolution, and Practical/Experimental Skills
A-Level Biology preparation overview

Why the Free and Premium Biology Pathways Work Together

“A disciplined, manageable, globally understandable study path for A-Level Biology.”

This page provides both an immediate free-practice pathway and a clear premium upgrade route for learners preparing for A-Level Biology across multiple examination systems. Candidates can first diagnose weaknesses through free topic-based tests, then progress to premium timed and solution-rich practice when greater depth is needed.

The layout uses clearer topic separation, stronger biology-focused visual structure, and improved navigation — making the page easier to scan and more useful for learners who want to identify exactly which topic to tackle next.

This section-based structure is especially valuable for learners preparing for Cambridge International, Pearson Edexcel, AQA, OCR and equivalent A-Level examinations who need a disciplined, manageable, and globally understandable study path for Biology.

Learners building a broader A-Level study plan can also continue with Mathematics practice, Physics practice, Chemistry practice, and Economics practice.

Better diagnosisTopic separation makes it easier to identify weaknesses in cells, biological molecules, transport, genetics, physiology, immunity, energetics, ecology, or practical skills.
Efficient revision flowAlternate between calculation-based, conceptual, and practical-style topics for balanced preparation.
Stronger exam readinessFocused practice supports better control, speed, and consistency in A-Level Biology examinations.
Have questions?

Frequently Asked Questions

Short answers that explain how to use the A-Level Biology page effectively.

What is the purpose of this A-Level Biology page?

This page provides a structured overview of the major A-Level Biology sections so learners understand what each topic involves before beginning practice. It connects syllabus awareness with focused exam preparation.

Is this page suitable for Cambridge International, Pearson Edexcel, AQA, OCR, and equivalent A-Level learners?

Yes. The page supports major A-Level and equivalent school-leaving Biology examinations while covering the shared core knowledge and skills learners are expected to master.

Are the 10 sections arranged in a useful study order?

Yes. The sections move through the major A-Level Biology domains in a logical sequence, although learners can begin with whichever topic requires the most attention.

Can I use this page for targeted A-Level revision?

Yes. The page supports focused topic practice in areas such as cells, biological molecules, membranes, genetics, physiology, immunity, photosynthesis, respiration, ecology, and experimental skills instead of requiring learners to revise everything at once.

Are the A-Level Biology practice tests free?

Yes. Learners can begin with the free topic-based Biology practice sections immediately without an access code. The free version is suitable for identifying weak topics and building confidence progressively.

What is the difference between the free version and the 1,000-question premium Biology version?

The free version lets learners practise immediately by topic. The premium version contains 1,000 structured practice questions and exercises, timed exam-style preparation, worked solutions, and access-code protection.

Can I use this page for Biology mock-exam preparation?

Yes. The free sections support topic revision, while the premium pathway is intended for timed, exam-style practice that can form part of a structured mock-examination routine.

What kinds of questions and skills does the practice cover?

The ten-topic structure supports biological knowledge, data interpretation, experimental design, molecular reasoning, systems analysis, and evidence-based evaluation across the main A-Level Biology areas.

How should I move from free to premium Biology practice?

Begin with the free sections to identify weak topics. Move to premium when you are ready to complete 1,000 practice questions and exercises, train under timed conditions, and use worked solutions to correct mistakes systematically.

Can teachers and parents use the page to organise revision?

Yes. Teachers and parents can use the ten-section structure to identify weak domains, assign focused practice, and monitor improvement across biological knowledge, data interpretation, experimental design, molecular reasoning, systems analysis, and evidence-based evaluation.