GCSE Biology Revision

AQA GCSE Biology study hub

Start from a unit, jump into a topic, or use the glossary to move through Biology by concept. Everything here is connected to already published ExamCompanion revision pages.

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7 units
Cell biology

Official AQA GCSE Biology 8461 unit covering cell biology topics and assessable knowledge.

3 topics

Cell structure

Study cell structure in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Cell division

Study cell division in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Transport in cells

Study transport in cells in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Organisation

Official AQA GCSE Biology 8461 unit covering organisation topics and assessable knowledge.

3 topics

Principles of organisation

Study principles of organisation in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Animal tissues, organs and organ systems

Study animal tissues, organs and organ systems in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Plant tissues, organs and systems

Study plant tissues, organs and systems in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Infection and response

Official AQA GCSE Biology 8461 unit covering infection and response topics and assessable knowledge.

3 topics

Communicable diseases

Study communicable diseases in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Monoclonal antibodies (biology only) (HT only)

Study monoclonal antibodies (biology only) (ht only) in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Plant disease (biology only)

Study plant disease (biology only) in AQA GCSE Biology 8461 using approved subtopics and learning objectives from the official specification structure.

Bioenergetics

Official AQA GCSE Biology 8461 unit covering photosynthesis, respiration, exercise response and metabolism.

2 topics

Photosynthesis

Study photosynthesis in AQA GCSE Biology 8461 through the photosynthetic reaction, limiting factors, required practical work, graph interpretation, and the uses of glucose made by plants.

Respiration

Study respiration in AQA GCSE Biology 8461 through cellular respiration, aerobic and anaerobic pathways, response to exercise, oxygen debt, fermentation and metabolic reactions.

Homeostasis and response

Official AQA GCSE Biology 8461 unit covering homeostasis, nervous coordination, hormonal coordination and plant hormones.

4 topics

Homeostasis

Study how nervous and chemical responses maintain stable internal conditions needed for cells, enzymes and body systems to function effectively.

The human nervous system

Study how the nervous system detects stimuli, coordinates rapid responses, protects the body through reflex actions and controls specialised organs.

Hormonal coordination in humans

Study how hormones coordinate slower, longer-lasting responses and how feedback systems control important internal conditions.

Plant hormones (biology only)

Study how plant hormones coordinate growth responses to light and gravity and how plant hormones are used in agriculture and horticulture.

Inheritance, variation and evolution

Official AQA GCSE Biology 8461 unit covering inheritance, meiosis, DNA, variation, evolution, genetics, classification and related data-analysis skills.

4 topics

Reproduction

Study how genetic information is copied, halved, inherited and expressed in AQA GCSE Biology 8461, including meiosis, DNA, Punnett squares and inherited disorders.

Variation and evolution

Study how variation arises, how natural selection changes populations, and how humans intervene through selective breeding, cloning and genetic engineering.

The development of understanding of genetics and evolution

Study how scientific understanding of genetics and evolution developed over time, how evidence supports evolutionary theory, and how resistant bacteria demonstrate rapid evolution.

Classification of living organisms

Study how classification systems have changed with evidence from structure, microscopy, biochemistry, DNA, fossils and evolutionary relationships.

Ecology

Official AQA GCSE Biology 8461 unit covering communities, ecosystem organisation, biodiversity, trophic levels, and food production. Ecology connects energy flow, material cycling, interdependence, sampling, human impacts, sustainability, and biotechnology.

5 topics

Adaptations, interdependence and competition

Students learn how organisms interact with living and non-living parts of ecosystems, how factors alter communities, and how adaptations support survival in normal and extreme environments.

Organisation of an ecosystem

Students connect producers, consumers, decomposers, sampling methods, material cycles, decay, and environmental changes using calculations, graphs, practical methods, and ecosystem reasoning.

Biodiversity and the effect of human interaction on ecosystems

Students learn how human activities reduce biodiversity, how evidence is used in environmental decisions, and how conservation measures can reduce harm to ecosystems.

Trophic levels in an ecosystem (biology only)

Students learn how biomass and energy move through food chains, why biomass is lost between trophic levels, and how to construct and interpret biomass pyramids.

Food production (biology only)

Students evaluate biological factors affecting food security and compare farming, fisheries, biotechnology, genetic modification, and microbial food production.

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abiotic factorabiotic factorabiotic factorabsorbedabstinenceabundanceabundanceabundanceaccommodationaccommodationacidic gasactive siteactivityadaptationadaptationadaptedADHADHadrenal glandsadrenalineadrenalineadrenalineadrenalineadult cell cloningadult cell cloningadvantages of asexual reproductionadvantages of monoclonal antibodiesaerobic conditionsaerobic respirationaerobic respiration