WJEC GCSE Biology is the separate-science route in Wales, taken alongside Chemistry and Physics rather than as part of the Double Award. It is examined in two written papers with practical work assessed through a practical assessment component.

Content covers cells and movement across membranes, respiration and photosynthesis, digestion, transport in humans and plants, homeostasis and the kidney, the nervous system, disease and immunity, genetics and inheritance, evolution, and ecosystems and human impact.

The specified practicals and the data-analysis questions built on them carry substantial marks, so understanding method and evaluation — not just results — is essential for a strong grade.

Curriculum Breakdown

Important Topics

Cells & Movement of Substances — Cell structure, diffusion, osmosis, active transport and enzyme action.
Respiration & Photosynthesis — Aerobic and anaerobic respiration, photosynthesis and limiting factors.
Human Systems — Digestion, circulation, breathing, the kidney and homeostasis.
Disease & Immunity — Pathogens, the immune response, vaccination and antibiotic resistance.
Genetics & Inheritance — DNA, genetic crosses, variation, mutation and genetic engineering.
Evolution & Classification — Natural selection, evidence for evolution and classifying organisms.
Ecology & Human Impact — Ecosystems, energy flow, sampling, pollution and sustainability.

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