Revision portal
GCSE Biology
Topic maps, in-depth guides and exam-style practice — organised by the same strands your course uses. Browse by area below or jump into a featured guide.
Revise by topic area
Each area links to a dedicated hub with every guide we publish in that strand — plus a shortcut to the full curriculum list.
Required practicals
Exam-board aligned guides: aim, method, variables, equipment, common mistakes and how to interpret results in the exam — grouped by topic on the hub.
Photosynthesis rate (pondweed)
To measure how changing light intensity affects the rate of oxygen production from a photosynthesising plant (often Elodea / Cabomba), using a valid method with controlled variables.
Osmosis in potatoes
To observe the net movement of water across a partially permeable membrane by measuring mass or length changes in tissue placed in different sugar concentrations.
Enzyme activity (catalase / amylase)
To measure how an enzyme-catalysed reaction rate changes with pH or temperature, using a repeatable measurement (gas volume, time to disappear colour, etc.).
Featured guides
Cell Biology
Cell Structure
Cell Structure is one of the first GCSE Biology topics where vague language costs marks fast.
Cell Biology
Microscopy
Microscopes are essential tools in biology for magnifying small objects.
Cell Biology
Animal, Plant & Bacterial Cells
Eukaryotic cells, like those in plants and animals, have a true nucleus and membrane-bound organelles.
Cell Biology
Specialised Cells
Specialised Cells is really an adaptation topic.
Cell Biology
Cell Differentiation
Cell differentiation is the process by which a less specialized cell becomes a more specialized cell type.
Cell Biology
Cell Division (Mitosis & Meiosis)
Cell division is essential for growth, repair, and reproduction.
Cell Biology
Stem Cells
Stem cells are undifferentiated cells with the potential to develop into various specialised cell types.
Cell Biology
Transport in Cells
Transport in Cells is the GCSE Biology route that brings diffusion, osmosis, and active transport together.
How to use this hub
- Pick a topic area you are weakest on — use your mocks or class tests to decide.
- Read the guide, then attempt practice questions without looking back at notes.
- Review mistakes using our mistake prompts, then move to the next guide in the same area.