Every topic in AQA GCSE Biology (8461)
3800 exam-style questions across 22 topics, each with a full mark scheme and revision notes. Free to try — no sign-up needed for the first topic.
-
Cell biology
Topic 1 · 156 questions
Every living thing is built from cells, and every cell is one of two kinds. The dividing line is simple: is the DNA shut inside a nucleus, or not?
-
Transport in cells
Topic 2 · 143 questions
Diffusion is how most small molecules get into and out of cells, and it costs the cell nothing. Whether an organism can rely on diffusion alone…
-
Cell division
Topic 3 · 155 questions
Bacteria divide by binary fission, and in the right conditions they do it fast enough that the numbers get big quickly. This sub-topic also covers…
-
Organisation in animals
Topic 4 · 203 questions
Big organisms are built up in stages. Cells specialise, group into tissues, tissues combine into organs, organs work together as organ systems,…
-
Enzymes and the human digestive system
Topic 5 · 187 questions
An enzyme is a protein that speeds up one particular reaction inside a living organism, without being changed or used up itself. Everything about…
-
Plant tissues, organs and systems
Topic 6 · 160 questions
Plant cells are organised into tissues, tissues into organs such as the leaf, and organs into organ systems. The leaf is the one to know inside…
-
Non-communicable disease
Topic 7 · 184 questions
Coronary heart disease is a non-communicable disease in which fatty material narrows the arteries that feed the heart muscle itself. Everything…
-
Communicable disease and plant defences
Topic 8 · 166 questions
Communicable diseases are caused by pathogens that pass from one organism to another. There are four kinds of pathogen, three main routes they…
-
Preventing and treating disease
Topic 9 · 171 questions
The body defends itself in two ways: physical and chemical barriers that stop pathogens getting in at all, and the immune system, which destroys…
-
Monoclonal antibodies
Topic 10 · 110 questions
A monoclonal antibody is one single antibody, made over and over again by a clone of identical cells. Because every molecule in the batch is the…
-
Photosynthesis
Topic 11 · 167 questions
Photosynthesis is the reaction that builds glucose out of carbon dioxide and water, using energy transferred by light. It happens in chloroplasts,…
-
Respiration
Topic 12 · 156 questions
Respiration is the set of chemical reactions that transfers energy from glucose, going on continuously in every living cell. It can happen with…
-
Homeostasis and the nervous system
Topic 13 · 185 questions
Homeostasis is the regulation of the conditions inside your body to keep a stable internal environment, so that cells and enzymes can work…
-
Hormonal coordination
Topic 14 · 221 questions
The second way of sending information around the body. Instead of electrical impulses along neurones, chemical messengers travel in the blood -…
-
DNA, genes and variation
Topic 15 · 165 questions
DNA is the chemical that carries the instructions for building and running an organism. It is packed into chromosomes in the nucleus, divided into…
-
Reproduction
Topic 16 · 186 questions
There are two ways of making new organisms. Sexual reproduction mixes genetic information from two parents and produces offspring that are all…
-
Evolution and Classification
Topic 17 · 193 questions
Evolution is a change in the inherited characteristics of a population over time, driven by natural selection. The theory holds that all species…
-
Adaptations, interdependence and competition
Topic 18 · 147 questions
Ecology is about organisms and the environment they live in, and how the two affect each other. This subtopic gives you the vocabulary — habitat,…
-
Organisation of an ecosystem
Topic 19 · 172 questions
Every food chain starts with a producer that builds biomass using energy from light. This sub-point also carries the fieldwork: quadrats,…
-
Humans and biodiversity
Topic 20 · 215 questions
Biodiversity is the variety of different species of organisms, and a high level of it keeps ecosystems stable. A growing human population that…
-
Working scientifically
Topic 21 · 201 questions
How scientific ideas are built, checked and replaced, and what happens when those ideas meet the rest of the world: money, ethics, the media and…
-
Practical skills
Topic 22 · 157 questions
Picking the right instrument for a measurement, and then reading it properly, is worth marks in every practical question. The two ideas that come…