AQA A-Level Biology
Explore your course, one topic at a time.
Course overview
The AQA A-Level Biology specification covers 8 topics and 53 subtopics with 1142 learning objectives (7402). Use the topic browser below to explore subtopics, exam tips, common mistakes, and key terminology for each area of the course.
- 8 topics · 53 subtopics
- 357 study pages
- 1142 learning objectives
Verified courseQuestions and notes checked against the official specification.
- 1,083
- verified practice questions
- 357
- verified teaching notes
- 53
- topics
Your exams
- Paper 1Monday, 7 June 2027, PM
- Paper 2Monday, 14 June 2027, PM
- Paper 3Friday, 18 June 2027, AM
Always confirm dates and times with your exam centre.
| Paper | Time | Marks | Weight |
|---|---|---|---|
| Paper 1: Topics 1–4 | 120 min | 91 | 35% |
| Paper 2: Topics 5–8 | 120 min | 91 | 35% |
| Paper 3: Synoptic topics 1–8 | 120 min | 78 | 30% |
Explore your topics
8 topics · 53 subtopics
Topics 1 to 44 topics · 28 subtopics
Biological molecules
Monomers and polymers6 specification points covering The variety of life, both past and present, is extensive, but the biochemical basis of life is similar for all living…18 objectives · 6 study pages- Carbohydrates8 specification points covering Monosaccharides are the monomers from which larger carbohydrates are made.24 objectives · 8 study pages
- Lipids8 specification points covering Triglycerides and phospholipids are two groups of lipid., Triglycerides are formed by the condensation of one molecule of…24 objectives · 8 study pages
- General properties of proteins9 specification points covering Amino acids are the monomers from which proteins are made.27 objectives · 9 study pages
- Many proteins are enzymes6 specification points covering Each enzyme lowers the activation energy of the reaction it catalyses., The induced-fit model of enzyme action., The…18 objectives · 6 study pages
- Structure of DNA and RNA7 specification points covering Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are important information-carrying molecules., In all living cells,…21 objectives · 7 study pages
- DNA replication3 specification points covering The semi-conservative replication of DNA ensures genetic continuity between generations of cells., The process of…9 objectives · 3 study pages
- ATP3 specification points covering A single molecule of adenosine triphosphate (ATP) is a nucleotide derivative and is formed from a molecule of ribose, a…9 objectives · 3 study pages
- WaterWater is polar, forming hydrogen bonds between molecules.3 objectives · 1 study page
- Inorganic ions3 specification points covering Inorganic ions occur in solution in the cytoplasm and body fluids of organisms, some in high concentrations and others in…9 objectives · 3 study pages
Cells
Structure of eukaryotic cells4 specification points covering The structure of eukaryotic cells, restricted to the structure and function of: cell-surface membrane nucleus (containing…13 objectives · 4 study pages- Structure of prokaryotic cells and of viruses3 specification points covering Prokaryotic cells are much smaller than eukaryotic cells.12 objectives · 3 study pages
12 of 28 shown
Topics 5 to 84 topics · 25 subtopics
Energy transfers in and between organisms
Photosynthesis (A-level only)7 specification points covering The light-dependent reaction in such detail as to show that: chlorophyll absorbs light, leading to photoionisation of…23 objectives · 7 study pages- Respiration (A-level only)8 specification points covering Respiration produces ATP., Glycolysis is the first stage of anaerobic and aerobic respiration.25 objectives · 8 study pages
- Energy and ecosystems (A-level only)11 specification points covering In any ecosystem, plants synthesise organic compounds from atmospheric, or aquatic, carbon dioxide., Most of the sugars…41 objectives · 11 study pages
- Nutrient cycles (A-level only)7 specification points covering Nutrients are recycled within natural ecosystems, exemplified by the nitrogen cycle and the phosphorus cycle.,…28 objectives · 7 study pages
Organisms respond to changes in their internal and external environments
Survival and response (A-level only)6 specification points covering Organisms increase their chance of survival by responding to changes in their environment., In flowering plants, specific…24 objectives · 6 study pages- Receptors (A-level only)4 specification points covering The Pacinian corpuscle should be used as an example of a receptor to illustrate that: receptors respond only to specific…16 objectives · 4 study pages
- Control of heart rate (A-level only)3 specification points covering Myogenic stimulation of the heart and transmission of a subsequent wave of electrical activity., The roles of the sinoatrial…9 objectives · 3 study pages
- Nerve impulses (A-level only)6 specification points covering The structure of a myelinated motor neurone., The establishment of a resting potential in terms of differential membrane…18 objectives · 6 study pages
- Synaptic transmission (A-level only)4 specification points covering The detailed structure of a synapse and of a neuromuscular junction., The sequence of events involved in transmission across…13 objectives · 4 study pages
- Skeletal muscles are stimulated to contract by nerves and act as6 specification points covering Muscles act in antagonistic pairs against an incompressible skeleton., Gross and microscopic structure of skeletal muscle.18 objectives · 6 study pages
- Principles of homeostasis and negative feedback (A-level only)6 specification points covering Homeostasis in mammals involves physiological control systems that maintain the internal environment within restricted…18 objectives · 6 study pages
- Control of blood glucose concentration (A-level only)9 specification points covering The factors that influence blood glucose concentration., The role of the liver in glycogenesis, glycogenolysis and…27 objectives · 9 study pages
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About this course
About AQA A-Level Biology
AQA A-Level Biology offers a comprehensive and rigorous journey through the science of life, from the chemistry of biological molecules to the complex interactions within ecosystems. The specification is structured around eight core topics that build logically: starting with Biological molecules and Cells, moving through how organisms exchange substances with their environment and the role of genetic information, then exploring variation, relationships between organisms, and the intricacies of energy transfers. This progression ensures that you develop deep, integrated understanding of both the unity and diversity of living systems.
A standout feature of AQA Biology is its clear narrative that connects small-scale processes to whole-organism and ecological dynamics. You'll investigate fundamental concepts like enzyme action, DNA replication, and cell division, then see how these underpin larger themes such as homeostasis, nervous coordination, and gene expression. Throughout, the specification sharpens your practical skills via 12 required practicals that are woven into the theory, preparing you not just for the written exams but also for future scientific study and a mindset of evidence-based enquiry.
The course also places a strong emphasis on synoptic and analytical skills, particularly in Paper 3, where you are challenged to synthesise knowledge across all topics and interpret experimental data. Whether you are aiming for a career in medicine, biotechnology, ecology, or another bioscience field, AQA A-Level Biology equips you with a thorough grounding in both the key principles and the scientific method, all supported by a wealth of high-quality resources developed by an experienced exam board.
Assessment Structure
The AQA A-Level Biology qualification is assessed entirely through three written examinations at the end of the two-year course, with no coursework component contributing to the final grade. Paper 1 covers Topics 1–4 (Biological molecules, Cells, Organisms exchange substances, Genetic information), is 2 hours long, worth 91 marks, and accounts for 35% of the A-level. Paper 2 covers Topics 5–8 (Energy transfers, Organisms respond to changes, Genetics and populations, Control of gene expression), also 2 hours, 91 marks, and 35%. Paper 3 is synoptic, drawing on any content from Topics 1–8, includes a 25-mark essay, lasts 2 hours, is worth 78 marks, and makes up the remaining 30%. Additionally, students must complete a Practical Endorsement (pass/fail) by carrying out twelve required practicals and keeping a lab book; this is reported separately on the certificate and is essential for many university science applications.
Why Choose AQA?
- AQA's specification is renowned for its logical and coherent structure, making it easier to grasp how concepts interconnect. The journey from molecule to ecosystem is clearly signposted, and the regular cycling of themes helps consolidate learning.
- The board provides exceptionally strong support for practical work, with detailed teacher guidance, student-friendly handbooks, and accessible equipment lists for the 12 required practicals. This makes skill development manageable and directly relevant to the exams, where practical-based questions can account for at least 15% of the marks.
- As the most widely taken Biology A-Level in England, AQA boasts a vast library of online resources, past papers, mark schemes, and examiner reports. This abundance means you can practise effectively and learn from real examiner feedback, giving you a clear advantage in understanding what top answers look like and where common mistakes occur.
Frequently Asked Questions
How many exams are there in AQA A-Level Biology and what do they cover?
Is there any coursework in AQA A-Level Biology?
What makes AQA A-Level Biology harder or easier compared to other exam boards like OCR?
How important are the required practicals for the final exams in AQA Biology?
Can I use AS-Level AQA Biology resources to study for the full A-Level?
Assessment and exam guidance
Assessment Objectives
Demonstrate knowledge and understanding of scientific ideas, processes, techniques and procedures
Apply knowledge and understanding of scientific ideas, processes, techniques and procedures in a theoretical context, in a practical context, when handling qualitative data and when handling quantitative data
Analyse, interpret and evaluate scientific information, ideas and evidence, including in relation to issues, to make judgements and reach conclusions and to develop and refine practical design and procedures
Exam Structure
Paper 1: Topics 1–4
2h
Duration
91
Marks
35%
Weighting
Paper 2: Topics 5–8
2h
Duration
91
Marks
35%
Weighting
Paper 3: Synoptic topics 1–8
2h
Duration
78
Marks
30%
Weighting
Tips and common mistakes
Common Exam Mistakes
Pitfalls to avoid in your exams
- •Assuming all carbon-containing compounds are organic; correct by remembering that simple carbon compounds like carbon dioxide (CO2) and carbonates are inorganic because they lack carbon-hydrogen bonds.
- •Misinterpreting a 'similar biochemical basis' to mean organisms have identical molecules; correct by understanding that while the classes of molecules (e.g., proteins) and monomers (e.g., amino acids) are shared, the specific sequences (e.g., amino acid sequences) differ between species.
- •Stating species are related solely because of similar physical appearances when asked for biochemical evidence; correct by specifically referencing shared molecules like DNA, RNA, or proteins.
- •Defining a monomer as just a small molecule, with no reference to the larger molecule it builds; a full definition needs both halves
- •Calling a disaccharide such as maltose a monomer because it is smaller than starch; it is a dimer, not a monomer
- •Naming glycerol or a fatty acid as a monomer of a triglyceride, when lipids are not polymers
- •Saying the monomers of DNA are bases rather than nucleotides; the monomer is the nucleotide, which contains a base, sugar and phosphate
- •Answering with the elements present, carbon, hydrogen and oxygen, when asked to identify a repeating unit
Top Examiner Tips
Expert advice for exam success
- •When evaluating evolutionary relationships, always specify the exact biochemical evidence being compared, such as the 'DNA base sequence' or 'amino acid sequence', rather than just writing 'DNA'.
- •The concept of a shared biochemical basis is an excellent linking theme for synoptic essays, connecting biological molecules to classification, evolution, and the genetic code.
- •Read the monomer off the diagram you are given - a question about an unfamiliar polymer like chitin is testing whether you can spot the repeating unit, not whether you have memorised it.
- •Pair every monomer with its polymer and bond when you revise: glucose-polysaccharide-glycosidic, amino acid-polypeptide-peptide, nucleotide-polynucleotide-phosphodiester.
- •In a definition question write both halves of the idea in one sentence: the small repeating unit and the larger molecule it builds.
- •When a question says 'use Figure 1', every point you make must be visible in the figure - the flipped monomer and the straight chain are there to be seen.
- •Check the branching before you mention 1,6 bonds; if the drawn chain is straight, a 1,6 bond is a marked error.
- •Structure means monomer, bond, chain shape and chain interactions - not the elements the molecule contains.
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