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Biology cover artwork
  1. A Level
  2. Biology Edexcel A

Biology

A Level·Edexcel A·9BN0

Browse Edexcel A A Level Biology lessons, questions, and revision tools. Free access to past papers from 2017–2025 with mark schemes. Edexcel A A Level Biology (9BN0) is a Level 3 qualification regulated by Ofqual, taken by students aged 16–18. It covers biological molecules, cells, exchange and transport, genetics and evolution, energy transfers, and responding to the environment, with a strong focus on analysing experimental data and applying biological principles to unfamiliar contexts. The course is a linear qualification graded A*–E, typically 360 guided learning hours, with first assessment in 2017.

Lifestyle, Health and Risk

Circulatory system and mass transport

Heart, blood vessels and cardiac cycle

Atherosclerosis, blood clotting and CVD

Risk factors, data and health studies

Carbohydrates and energy balance

Lipids, cholesterol and CVD treatments

Genes and Health

Gas exchange and diffusion

Cell membranes and transport

DNA, RNA and protein synthesis

Proteins, enzymes and enzyme kinetics

DNA replication, mutation and cystic fibrosis

Monohybrid inheritance and genetic screening

Voice of the Genome

Eukaryotic and prokaryotic cell ultrastructure

Protein transport and microscopy

Gametes, fertilisation and meiosis

Mitosis, cell cycle and stem cells

Differential gene expression and cell specialisation

Epigenetics, phenotype and continuous variation

Biodiversity and Natural Resources

Biodiversity, endemism and diversity indices

Niches, adaptation and natural selection

Hardy-Weinberg, isolation and speciation

Classification and molecular phylogeny

Plant cells, starch and cellulose

Plant transport tissues, sustainability and conservation

On the Wild Side

Ecosystems, niches and ecological sampling

Succession and photosynthesis overview

Light-dependent and light-independent reactions

ATP, productivity and energy transfer

Climate change evidence, modelling and effects

Evolution, carbon cycle and sustainable management

Immunity, Infection and Forensics

Forensics and time of death

DNA profiling, PCR and gel electrophoresis

Bacteria, viruses and pathogen entry

Non-specific and specific immune responses

Immunity, pathogen evolution and antibiotics

Hospital-acquired infections and infection control

Run for your Life

Muscles, skeleton and movement

Sliding filament theory

Aerobic and anaerobic respiration

Cardiac control, ECGs and exercise physiology

Muscle fibres, feedback and homeostasis

Exercise risks, medical technology and performance ethics

Grey Matter

Neurones and action potentials

Synapses and neurotransmitters

Receptors, vision and plant responses

Brain structure and imaging

Visual development, animal studies and habituation

Brain chemicals, personalised medicine and GM organisms

Assessment at a glance

AssessmentFormatDurationMarksWeighting
Paper 1Written exam2h100 marks33.3%
Paper 2Written exam2h100 marks33.3%
Paper 3Written exam2h100 marks33.3%
Practical endorsementNon-exam assessment——Pass/fail

All topics

Lifestyle, Health and Risk

Circulatory system and mass transport

Heart, blood vessels and cardiac cycle

Atherosclerosis, blood clotting and CVD

Risk factors, data and health studies

Carbohydrates and energy balance

Lipids, cholesterol and CVD treatments

Genes and Health

Gas exchange and diffusion

Cell membranes and transport

DNA, RNA and protein synthesis

Proteins, enzymes and enzyme kinetics

DNA replication, mutation and cystic fibrosis

Monohybrid inheritance and genetic screening

Voice of the Genome

Eukaryotic and prokaryotic cell ultrastructure

Protein transport and microscopy

Gametes, fertilisation and meiosis

Mitosis, cell cycle and stem cells

Differential gene expression and cell specialisation

Epigenetics, phenotype and continuous variation

Biodiversity and Natural Resources

Biodiversity, endemism and diversity indices

Niches, adaptation and natural selection

Hardy-Weinberg, isolation and speciation

Classification and molecular phylogeny

Plant cells, starch and cellulose

Plant transport tissues, sustainability and conservation

On the Wild Side

Ecosystems, niches and ecological sampling

Succession and photosynthesis overview

Light-dependent and light-independent reactions

ATP, productivity and energy transfer

Climate change evidence, modelling and effects

Evolution, carbon cycle and sustainable management

Immunity, Infection and Forensics

Forensics and time of death

DNA profiling, PCR and gel electrophoresis

Bacteria, viruses and pathogen entry

Non-specific and specific immune responses

Immunity, pathogen evolution and antibiotics

Hospital-acquired infections and infection control

Run for your Life

Muscles, skeleton and movement

Sliding filament theory

Aerobic and anaerobic respiration

Cardiac control, ECGs and exercise physiology

Muscle fibres, feedback and homeostasis

Exercise risks, medical technology and performance ethics

Grey Matter

Neurones and action potentials

Synapses and neurotransmitters

Receptors, vision and plant responses

Brain structure and imaging

Visual development, animal studies and habituation

Brain chemicals, personalised medicine and GM organisms

Course aims & skills

Edexcel A A Level Biology builds the skills examiners reward. By the end of the course you should be able to:

  • recall scientific facts, terms, definitions and units
  • apply knowledge and understanding to unfamiliar situations
  • interpret, analyse and evaluate experimental data
  • plan investigations and evaluate methods and conclusions
  • carry out the required practicals and describe the techniques
  • use and rearrange equations, and work with significant figures
  • process data with appropriate maths skills
  • construct and read graphs, tables and diagrams
  • build and communicate evidence-based scientific arguments

Frequently Asked Questions