OVERVIEW

What is A-Level Biology?

A-Level Biology is the gateway qualification for Medicine, Dentistry, Veterinary Science, Biomedical Sciences, and Ecology. It is one of the most content-heavy A-Level subjects, covering cell biology, genetics, human physiology, ecology, and evolution in considerable depth across two years. In addition to content knowledge, A-Level Biology increasingly demands extended written responses, data analysis, and practical skills — all of which require dedicated preparation beyond classroom teaching. At Improve ME, our specialist Biology tutors combine thorough content delivery with the essay technique and data response skills that consistently separate A and A* candidates from the rest of the field.

A-Level

Qualification

Ages 16-18

Age range

AQA • Edexcel • OCR

Exam boards

COURSE CONTENT

A-Level Biology Course Content

Advanced depth with step-by-step problem-solving, synoptic assessment preparation, and top-grade strategy for university.

Cells, Exchange & Transport

Cell structure — prokaryotic and eukaryotic cells, ultrastructure, cell fractionation, microscopy calculations
Biological molecules — water, carbohydrates, lipids, proteins (structure, function, and testing); enzymes (mechanism, factors affecting rate, inhibition)
Cell membranes and transport — fluid mosaic model, osmosis, diffusion, active transport, endocytosis, exocytosis
Cell division — mitosis and the cell cycle, meiosis, significance of cell division in growth and reproduction
Exchange surfaces — surface area to volume ratio, adaptations of exchange surfaces, gas exchange in mammals, fish, and insects
Mass transport — haemoglobin (structure, oxygen dissociation curves, Bohr shift); xylem and phloem (structure and function); transpiration (cohesion-tension theory)

Genetics, Evolution & Ecosystems

Nucleic acids — DNA and RNA structure, semi-conservative replication, transcription and translation, genetic code
Genetic inheritance — monohybrid and dihybrid crosses, codominance, sex linkage, epistasis, Hardy-Weinberg principle
Gene expression and regulation — totipotency, stem cells, gene expression in prokaryotes and eukaryotes, epigenetics, cancer
Recombinant DNA technology — restriction enzymes, vectors, PCR, gel electrophoresis, genetic engineering applications
Evolution and classification — natural selection, evidence for evolution, speciation, phylogenetics, classification systems
Ecosystems — nutrient cycles (carbon and nitrogen), energy transfer and efficiency, succession, conservation and biodiversity

Control, Homeostasis & Reproduction

Nervous system — neurones (structure and function), action potentials, synaptic transmission, the brain, reflexes
Hormonal system — endocrine glands and hormones, insulin and glucagon in blood glucose regulation, adrenaline
Homeostasis — principles of negative feedback, thermoregulation in mammals, osmoregulation (kidney structure and function, ADH)
Plant responses — tropisms, auxin, gibberellins, commercial applications of plant hormones
Immunity — specific and non-specific defence, B and T lymphocytes, primary and secondary immune responses, vaccines, monoclonal antibodies
Reproduction — sexual and asexual reproduction, meiosis in context, IVF and cloning, ethical considerations

Unit Structure AQA A-Level Biology unit structure: Unit 1: Molecules, Diet, Transport and Health Unit 2: Cells, Development, Biodiversity and Conservation Unit 3: Practical Skills in Biology I Unit 4: Energy, Environment, Microbiology and Immunity Unit 5: Respiration, Internal Environment, Coordination and Gene Technology Unit 6: Practical Skills in Biology II Edexcel and OCR follow different unit structures. Cambridge A-Level Biology has its own paper and practical assessment format.

ASSESSMENT

Assessment Structure

Three papers plus practical endorsement. We support synoptic assessment and the deep understanding examiners reward at A-Level.

Paper 1

Cells, Exchange, Transport, and Genetics

2 hours, 91 marks — approximately 35% of A-Level
Short and long answer, including extended writing
Cell biology, biological molecules, exchange, transport, genetics and gene expression

Paper 2

Control, Homeostasis, Reproduction, and Ecosystems

2 hours, 91 marks — approximately 35% of A-Level
Short and long answer, including extended writing
Nervous and hormonal systems, homeostasis, plant responses, immunity, reproduction, ecosystems

Paper 3

Practical Skills and Synoptic Content

2 hours, 78 marks — approximately 30% of A-Level
Structured questions, critical commentary on data, essay (choice of two) — 15-mark extended essay requires detailed, well-structured biological writing
Practical Endorsement: pass/fail assessed in school, reported separately

EXAM BOARDS

Exam Boards We Cover

AQA

Pearson Edexcel

OCR

Not sure which board your child is on? We'll check at your free assessment.

TEACHING APPROACH

Our A-Level Biology Teaching Approach

01

Content Consolidation

A-Level Biology contains more factual content than almost any other A-Level. We use active recall, spaced repetition, and concept mapping to ensure students retain content reliably rather than losing marks through forgetting.

02

Extended Writing Technique

Papers 1, 2, and 3 all include extended writing questions worth 6–15 marks. We teach students to plan and write these responses with the specific biological vocabulary, logical sequencing, and completeness that mark schemes demand.

03

Data Response and Experimental Analysis

A-Level Biology papers routinely present unfamiliar experimental data for students to interpret. We train students to extract relevant information, apply their biological knowledge, and draw evidence-based conclusions — a skill that requires dedicated practice.

04

Practical Paper and Essay

Paper 3 includes both a critical commentary on experimental data and a choice of 15-mark essays. We prepare students specifically for both — covering common essay titles and the expected content for each.

WHY CHOOSE US