Random Walker
  • AQA A-level Biology
    • Unit 1 — Biological Molecules
      • Monomers and Polymers
      • Carbohydrates
      • Lipids
      • Protein Properties
      • Enzymes
      • Structure of DNA & RNA
      • DNA Replication
      • ATP
      • Water and Inorganic Ions
    • Unit 2 — Cells
      • Eukaryotic Cell Structure
      • Prokaryotic Cells & Viruses
      • Methods of Studying Cells
      • All Cells Arise from Other Cells
      • Transport Across Cell Membranes
      • Cell Recognition & Immune System
      • HIV and AIDS
      • Monoclonal Antibodies & ELISA
    • Unit 3 — Exchange & Transport
      • Surface Area to Volume Ratio
      • Gas Exchange
      • Digestion and Absorption
      • Mass Transport in Animals
      • Mass Transport in Plants: Xylem
      • Mass Transport in Plants: Phloem
    • Unit 4 — Genetics
      • DNA, Genes & Chromosomes
      • DNA and Protein Synthesis
      • Genetic Diversity: Mutation and Meiosis
      • Genetic Diversity and Adaptation
      • Species and Taxonomy
      • Biodiversity in the Community
      • Investigating Diversity
    • Unit 5 — Energy & Ecosystems
      • Photosynthesis
      • Chromatography
      • Dehydrogenase
      • Respiration
      • Energy & Ecosystems
      • Nutrient Cycles
    • Unit 6 — Respond to Changes
      • Principles of Homeostasis
      • Nerve Impulses
      • Synaptic Transmission
      • Skeletal Muscles
      • Kidneys
      • Control of Blood Glucose
    • Unit 7 — Inheritance
      • Monohybrid Inheritance
      • Dihybrid Inheritance
      • The Chi-Squared Test
      • Populations
      • Evolution May Lead to Speciation
      • Populations in Ecosystems
    • Unit 8 — Gene Expression
      • Unit 8 Overview
      • Gene Mutations
      • Stem Cells
      • Regulation Transcription & Translation
      • Cancer
      • Genome Projects
      • Recombinant DNA
      • DNA Probes
      • Genetic Fingerprinting
    • Practice Tools
      • Genetic Crosses Practice
      • Index of Diversity
    • Exam Skills
      • Essay Guidance
    • Exam Insights
    • Flashcards
    • Mind Maps
    • Course Map
    • Exam Practice
  • Interactive Simulations
    • Mutations
    • Synapse Drug Effects
    • Transport Across Membranes
    • Blood Glucose Regulation
    • O₂ Dissociation Curve
    • Tissue Fluid
    • Cardiac Cycle
    • Cohesion-Tension
    • Mass Flow Hypothesis
    • Transcription
  • Images & Animations
Home › AQA A-level Biology

AQA A-level Biology

AQA A-Level Biology

These resources follow the AQA A-Level Biology specification (7402).

Notes by unit

Unit 1 — Biological Molecules

36 of 36 spec points

Unit 2 — Cells

37 of 37 spec points

Unit 3 — Exchange & Transport

19 of 21 spec points

Unit 4 — Genetics

29 of 29 spec points

Unit 5 — Energy & Ecosystems

18 of 19 spec points

Unit 6 — Respond to Changes

25 of 34 spec points

Unit 7 — Inheritance

18 of 18 spec points

Unit 8 — Gene Expression

22 of 24 spec points

Revision and exam practice

Flashcards

Topic-by-topic recall practice, built from the spec, past papers and examiner reports

Exam Practice

Exam-style questions by unit and topic, with hints, mark schemes and tips

Exam Insights

Analysis of past paper data from 2017 to 2025

Mind Maps

Interactive revision mind maps for each unit, with zoom, fullscreen, and print

Practice Tools

Interactive tools for practising genetic crosses and the index of diversity

Exam Skills

How to plan and write the Paper 3 essay, with practice titles

Course map

Every topic on the site, grouped by unit. The lines show where one topic links to another. Hover over a topic to see its links, and click to open it. It also has its own page: Course Map.

Made with Zola