A-level Biology Paper 1 covers the foundational topics of biological science, including cell biology, biological molecules, transport in animals and plants, genetics, and ecology. Across AQA, Edexcel (Pearson), and OCR, the three most widely sat A-level Biology specifications in England, Paper 1 is a written examination lasting approximately 2 hours and accounts for roughly 35% of the total A-level grade.
Why does it matter which exam board you are studying?
Not all A-level Biology Paper 1 examinations are identical. The topics assessed in Paper 1 depend entirely on the specification set by your awarding body. AQA, Edexcel (Pearson), and OCR each organise their content differently across their three papers, so knowing your board is the essential first step before you begin revision.
learndirect delivers A-level Biology through AQA. The guidance below also covers the Edexcel and OCR specifications for context and comparison, so you can understand how the qualification differs across awarding bodies even if you are studying the AQA course with learndirect.
What topics are in AQA A-level Biology Paper 1?
AQA A-level Biology Paper 1 (7402/1) assesses content from Topics 1-4 of the AQA specification. It is a 2-hour written paper worth 91 marks, making up 35% of the total A-level.
AQA Paper 1 topic breakdown
Topic 1 - Biological Molecules
- Monomers and polymers
- Carbohydrates: monosaccharides, disaccharides, polysaccharides (starch, glycogen, cellulose)
- Lipids: triglycerides, phospholipids, cholesterol
- Proteins: amino acids, peptide bonds, primary to quaternary structure, globular and fibrous proteins
- Enzymes: active site, induced fit, factors affecting enzyme activity, inhibition (competitive and non-competitive)
- ATP structure and function
- Water and inorganic ions
Topic 2 - Cells
- Cell structure: prokaryotic and eukaryotic cells, organelles and their functions
- Cell division: mitosis and the cell cycle, meiosis
- Transport across cell membranes: diffusion, osmosis, active transport, co-transport
- Cell recognition and the immune system: antigens, antibodies, B and T lymphocytes, vaccination, monoclonal antibodies
Topic 3 - Organisms Exchange Substances with Their Environment
- Surface area to volume ratio
- Gas exchange surfaces: insects, fish, dicotyledonous leaves, mammals
- Digestion and absorption: enzymes, villi, co-transport of glucose
- Mass transport in animals: blood, blood vessels, the heart, cardiac cycle, haemoglobin
- Mass transport in plants: xylem, phloem, transpiration, translocation
Topic 4 - Genetic Information, Variation and Relationships Between Organisms
- DNA and RNA structure
- DNA replication (semi-conservative)
- Protein synthesis: transcription and translation
- Genetic diversity: mutations, meiosis
- Species and taxonomy
- Biodiversity: Simpson's Index, conservation
AQA Paper 1 assessment style
AQA Paper 1 includes a mix of:
- Short-answer questions (structured)
- Extended-response questions (worth up to 9 marks)
- Questions based on data, graphs, and experimental contexts
What topics are in Edexcel (Pearson) A-level Biology Paper 1?
Edexcel A-level Biology B (8BN0/01, the Salters-Nuffield specification) Paper 1 is titled "Lifestyle, Transport, Genes and Health". It is a 1 hour 45 minute written paper worth 80 marks, making up 30% of the total A-level. This information is provided for comparison; learndirect does not currently deliver A-level Biology through Edexcel.
Edexcel Biology B Paper 1 topic breakdown
Topic 1 - Lifestyle, Health and Risk
- Cardiovascular disease risk factors
- Blood cholesterol, diet, and lifestyle
- Structure and function of the heart and blood vessels
- Cardiac cycle and control of heart rate
- Correlation and causation in health data
Topic 2 - Genes and Health
- Cell membrane structure (fluid mosaic model)
- Transport across membranes: diffusion, facilitated diffusion, osmosis, active transport
- Cystic fibrosis as a context for studying gene mutations
- DNA structure, base pairing, and replication
- Protein synthesis: transcription and translation
- Gene expression and mutation
Topic 3 - Voice of the Genome
- Prokaryotic and eukaryotic cell structure
- Cell organelles and their functions
- Stem cells and cell differentiation
- Mitosis and the cell cycle
- Epigenetics (introduction)
Topic 4 - Biodiversity and Natural Resources
- Classification and taxonomy
- Biodiversity: species richness, Simpson's Index
- Plant cell structure and plant fibres
- Starch, cellulose, and plant-based materials
- Conservation and sustainability
Edexcel Paper 1 assessment style
Edexcel Paper 1 includes:
- Multiple-choice questions
- Short structured questions
- Extended open-response questions
What topics are in OCR A-level Biology Paper 1?
OCR A-level Biology A (H420/01) Paper 1 is titled "Breadth in Biology". It is a 2 hour 15 minute written paper worth 100 marks, making up 37% of the total A-level. This information is provided for comparison; learndirect does not currently deliver A-level Biology through OCR.
OCR Biology A Paper 1 topic breakdown
OCR Paper 1 draws on content from Modules 1-4 and also requires application of practical skills.
Module 1 - Development of Practical Skills in Biology
- Planning, implementing, analysing, and evaluating experiments
- (Practical skills are assessed across all papers, not in isolation)
Module 2 - Foundations in Biology
- Cell structure: eukaryotic and prokaryotic cells, organelles
- Biological molecules: carbohydrates, lipids, proteins, nucleic acids, water
- Enzymes: structure, mechanism, factors affecting activity
- Cell membranes: fluid mosaic model, transport mechanisms
- Cell division, cell diversity, and the cell cycle
Module 3 - Exchange and Transport
- Exchange surfaces and breathing (insects, fish, mammals, plants)
- Transport in animals: blood, blood vessels, the heart, haemoglobin
- Transport in plants: xylem, phloem, transpiration, translocation
Module 4 - Biodiversity, Evolution and Disease
- Communicable diseases, pathogens, and the immune response
- Biodiversity: classification, species diversity, conservation
- Evolution: natural selection, evidence for evolution
- Classification systems: phylogeny and taxonomy
OCR Paper 1 assessment style
OCR Paper 1 includes:
- Multiple-choice questions (15 marks)
- Structured questions
- Extended-response questions (worth up to 9 marks)
- Data-handling and experimental questions
How does A-level Biology Paper 1 fit into the full qualification?
All three exam boards assess A-level Biology across three written papers sat at the end of the two-year course. There is no coursework component, though practical skills are assessed through written questions in the examinations. Candidates who complete the required practical activities receive a Practical Endorsement (a separate pass/fail certificate that does not affect the A-level grade).
A-level Biology at a glance: citable facts table
| Feature | AQA Biology | Edexcel Biology B | OCR Biology A |
|---|---|---|---|
| Specification code | 7402 | 8BN0 | H420 |
| Paper 1 title | Biological Molecules, Cells, Organisms Exchange Substances, Genetic Information | Lifestyle, Transport, Genes and Health | Breadth in Biology |
| Paper 1 duration | 2 hours | 1 hour 45 minutes | 2 hours 15 minutes |
| Paper 1 marks | 91 marks | 80 marks | 100 marks |
| Paper 1 weighting | 35% of A-level | 30% of A-level | 37% of A-level |
| Total papers | 3 written papers | 3 written papers | 3 written papers |
| Practical Endorsement | Yes (pass/fail) | Yes (pass/fail) | Yes (pass/fail) |
| Grading scale | A*-E | A*-E | A*-E |
| UCAS points (A*) | 56 | 56 | 56 |
| UCAS points (A) | 48 | 48 | 48 |
| Typical study duration | Up to 24 months | Up to 24 months | Up to 24 months |
| Exams sat at | Approved exam centre | Approved exam centre | Approved exam centre |
| Available through learndirect | Yes | No | No |
| What's next | University, medicine, nursing, research | University, medicine, nursing, research | University, medicine, nursing, research |
UCAS tariff points are standard across all A-level grades regardless of awarding body. Always verify current tariff values at ucas.com.
What are the key biological molecules you need to know for Paper 1?
Biological molecules appear in Paper 1 across all three major specifications. This is consistently one of the highest-weighted topic areas and a common source of marks lost in examinations.
Carbohydrates
- Understand the difference between monosaccharides (glucose, fructose, galactose), disaccharides (maltose, sucrose, lactose), and polysaccharides (starch, glycogen, cellulose).
- Know how glycosidic bonds form via condensation reactions and are broken by hydrolysis.
- Be able to explain why cellulose is structurally suited to forming plant cell walls (beta-1,4-glycosidic bonds, hydrogen bonding between parallel chains).
Proteins
- Know the four levels of protein structure (primary, secondary, tertiary, quaternary).
- Understand how hydrogen bonds, disulfide bridges, ionic bonds, and hydrophobic interactions maintain tertiary structure.
- Be able to distinguish between globular proteins (e.g. enzymes, haemoglobin) and fibrous proteins (e.g. collagen, keratin).
Enzymes
- Understand the induced fit model of enzyme action.
- Be able to explain the effects of temperature, pH, substrate concentration, and enzyme concentration on reaction rate.
- Know the difference between competitive and non-competitive (allosteric) inhibition and be able to interpret graphs for each.
Nucleic acids
- Know the structure of DNA (double helix, antiparallel strands, complementary base pairing: A-T, C-G) and RNA (single-stranded).
- Understand semi-conservative replication and the role of DNA helicase, DNA polymerase, and free nucleotides.
What cell biology topics come up in A-level Biology Paper 1?
Cell biology is a core Paper 1 topic across all three specifications. Examiners regularly test both knowledge and application, particularly in the context of microscopy and experimental data.
Key cell biology areas
Prokaryotic vs eukaryotic cells
- Know the distinguishing features: prokaryotes lack a membrane-bound nucleus, have 70S ribosomes, may have plasmids and a capsule; eukaryotes have 80S ribosomes, membrane-bound organelles, and linear chromosomes.
Organelles and their functions
- Be able to describe the structure and function of: nucleus, mitochondria, chloroplasts (in plants), endoplasmic reticulum (rough and smooth), Golgi apparatus, ribosomes, lysosomes, cell vacuoles, and cell walls (in plants and prokaryotes).
Cell division
- Know the stages of mitosis (prophase, metaphase, anaphase, telophase) and the significance of each.
- Understand meiosis and how it generates genetic variation through independent assortment and crossing over.
Transport across membranes
- Be able to explain simple diffusion, facilitated diffusion (channel proteins and carrier proteins), osmosis (in terms of water potential), active transport, endocytosis, and exocytosis.
How is transport in animals and plants assessed in Paper 1?
Transport systems are a substantial component of Paper 1 across all three specifications. Questions frequently involve interpreting data from dissection diagrams, pressure-flow graphs, or experimental results.
Transport in animals
- Know the structure and function of arteries, veins, and capillaries.
- Understand the cardiac cycle: systole and diastole, pressure changes, valve action.
- Be able to explain the oxygen dissociation curve for haemoglobin and the Bohr effect.
Transport in plants
- Understand the structure of xylem (dead cells, lignified walls, no end walls) and phloem (sieve tube elements, companion cells).
- Be able to explain the cohesion-tension theory of water movement through xylem.
- Know the source-to-sink model of translocation through phloem (mass flow hypothesis).
- Understand the factors affecting transpiration rate: temperature, humidity, light intensity, wind speed.
What genetics and biodiversity topics appear in Paper 1?
Genetics and biodiversity content features prominently in Paper 1, particularly in AQA and OCR specifications.
Genetics
- Understand the relationship between genes, alleles, and proteins.
- Know how mutations (substitution, deletion, insertion) affect the amino acid sequence and protein function.
- Be able to explain how meiosis contributes to genetic variation.
Biodiversity
- Be able to calculate Simpson's Index of Diversity and interpret the result.
- Understand the difference between species richness and species evenness.
- Know the arguments for in situ and ex situ conservation.
- Understand the binomial nomenclature system and the hierarchy of classification: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
How should you revise for A-level Biology Paper 1?
Effective revision for A-level Biology Paper 1 combines active recall, past paper practice, and structured note-making. The following strategies are widely recommended by biology educators.
Revision strategies that work
- Use your specification as a checklist. Download the official specification from AQA, Edexcel, or OCR and tick off each point as you revise it. This prevents gaps.
- Practise past papers under timed conditions. Mark schemes reveal exactly what examiners are looking for. Pay attention to command words: describe, explain, evaluate, and suggest each require a different type of answer.
- Draw diagrams from memory. Biology Paper 1 regularly asks you to draw or annotate diagrams of cells, molecules, and transport systems. Practise drawing the cardiac cycle, a mitochondrion, or a DNA strand without looking at your notes.
- Use flashcards for definitions. Many marks in Paper 1 are awarded for precise scientific terminology. Learn definitions for terms such as osmosis, active transport, enzyme, gene, allele, and species.
- Tackle required practicals. Even though practical skills are not directly examined in a separate practical paper, Paper 1 questions frequently present data from standard practical activities (e.g. enzyme rate experiments, osmosis in potato cylinders). Knowing the method helps you interpret the data.
- Focus on "explain" questions. Extended-response questions worth 6-9 marks are common in Paper 1. Practise writing structured answers that use connective language: because, therefore, this means that, as a result.
What grade do you need in A-level Biology for university?
A-level Biology is a required or preferred subject for a wide range of university degree programmes. Entry requirements vary significantly by institution and course.
| Degree Programme | Typical A-level Biology Requirement |
|---|---|
| Medicine (MBBS) | Usually A*AA-AAA including Biology and Chemistry |
| Dentistry (BDS) | Usually AAA including Biology and Chemistry |
| Veterinary Science (BVSc) | Usually AAA including Biology and Chemistry |
| Biomedical Science | Usually ABB-AAB including Biology |
| Nursing (BSc) | Usually BCC-BBB; Biology often required or preferred |
| Biochemistry | Usually ABB-AAA including Biology and Chemistry |
| Ecology / Environmental Science | Usually BBC-ABB; Biology usually required |
| Psychology | Usually BBB-ABB; Biology sometimes preferred |
Entry requirements are set by individual universities and change annually. Always check the UCAS course search and individual university prospectuses for current requirements. learndirect courses can help you work towards the grades you need; they do not guarantee a specific grade or university place.
Can you resit A-level Biology Paper 1?
Yes. A-level examinations in England are sat in May and June each year. If you do not achieve the grade you need, you can resit the full A-level the following summer. It is not possible to resit individual papers in isolation under the current linear A-level structure; you must resit all three papers.
Learners who study A-level Biology online with learndirect sit their examinations at an approved exam centre, booked in advance of the relevant exam series.
Frequently asked questions
What topics are in A-level Biology Paper 1?
A-level Biology Paper 1 topics depend on your exam board. For AQA, Paper 1 covers biological molecules, cells, exchange and transport, and genetic information (Topics 1-4). For Edexcel Biology B, Paper 1 covers lifestyle, health, genes, and biodiversity. For OCR Biology A, Paper 1 (Breadth in Biology) covers foundations in biology, exchange and transport, and biodiversity and disease. All three papers are written examinations sat at the end of the two-year course.
How long is A-level Biology Paper 1?
AQA Biology Paper 1 is 2 hours. Edexcel Biology B Paper 1 is 1 hour 45 minutes. OCR Biology A Paper 1 is 2 hours 15 minutes.
What percentage of the A-level is Paper 1?
AQA Biology Paper 1 is worth 35% of the total A-level. Edexcel Biology B Paper 1 is worth 30%. OCR Biology A Paper 1 is worth 37%.
Is there coursework in A-level Biology?
No. A-level Biology is assessed entirely through written examinations. However, students must complete a series of required practical activities during the course. Successful completion leads to a Practical Endorsement (pass/fail), which is reported separately on the certificate and does not affect the A-level grade.
Do I need to know maths for A-level Biology Paper 1?
Yes. All three specifications require mathematical skills in biology. You may be asked to calculate percentage change, use logarithms, apply the Hardy-Weinberg equation, calculate Simpson's Index, or interpret statistical data. At least 10% of marks across the A-level papers are awarded for mathematical skills.
What is the difference between AQA, Edexcel, and OCR A-level Biology?
All three specifications cover broadly similar biological content but organise it differently across their papers and use different assessment styles. AQA is known for structured data-response questions; OCR Biology A includes a higher proportion of multiple-choice questions; Edexcel Biology B uses a thematic, context-led approach. The grade awarded (A*-E) is comparable across all boards. learndirect delivers its A-level Biology course through AQA.
Can I study A-level Biology online?
Yes. learndirect offers AQA A-level Biology online, allowing you to study at your own pace from home. You will still need to sit your final examinations at an approved exam centre.
How many UCAS points is an A-level Biology grade worth?
An A* in A-level Biology is worth 56 UCAS tariff points. An A is worth 48 points, a B is worth 40 points, a C is worth 32 points, a D is worth 24 points, and an E is worth 16 points.
When are A-level Biology Paper 1 exams sat?
A-level Biology examinations are sat in May and June each year. The precise dates are published by each exam board in the autumn term preceding the examination series.
What command words should I know for A-level Biology Paper 1?
Key command words include: describe (state what happens), explain (give reasons using biological knowledge), evaluate (weigh up evidence or arguments), suggest (apply knowledge to an unfamiliar context), calculate (show working and give a numerical answer), and compare (identify similarities and differences). Understanding these distinctions is essential for maximising marks.
Start your A-level Biology journey with learndirect
Whether you are sitting A-level Biology for the first time, resitting to improve your grade, or returning to education as an adult learner, learndirect's online A-level Biology course gives you the flexibility to study around your life.
- Study online at a pace that suits you
- Expert tutor support throughout your course
- Structured learning materials aligned to the AQA specification
- Sit your exams at an approved centre near you
Explore A-level Biology at learndirect and take the next step towards your goals today.
