GCSE Biology Revision: Complete Topic Guide
Every topic. One clear path.
Explore clear GCSE Biology explanations, key definitions, required practicals, diagrams and exam questions across the full course.
- GCSE
- 7 Units
- 61 Topics
Explore the GCSE Biology syllabus
Choose a unit and see every lesson in the full topic map.
Infection & Response
- Communicable Diseases
- Vaccination
- Antibiotics
- Viral Diseases
Bioenergetics
- Photosynthesis
- Photosynthesis Required Practical
- Limiting Factors of Photosynthesis
- Respiration
Homeostasis & Response
- Nervous System
- Hormones
- Control of Blood Glucose
- Human Reproduction
Inheritance, Variation & Evolution
- DNA and the Genome
- Genetic Inheritance
- Evolution
- Natural Selection
Required Practicals & Diagrams
MUST KNOW
Practical 4: Food Tests
Testing for carbohydrates, lipids, and proteins.
- Benedict's: Tests for Sugars (Blue to Brick Red)
- Iodine: Tests for Starch (Brown to Blue-Black)
- Biuret: Tests for Proteins (Blue to Purple)
- Sudan III: Tests for Lipids (Red layer)
Key Definitions
Osmosis
The net movement of water from a dilute to a concentrated solution through a partially permeable membrane.
Homeostasis
Maintenance of a constant internal environment despite external changes.
Enzyme
A biological catalyst that speeds up chemical reactions without being used up.
Microscopy
Cell observations and magnification
Ecology sampling
Estimate populations
Revise with a simple three-step routine
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1. Learn
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2. Recall
Explain it without looking at your notes.
3. Practise
Check answers and revise difficult points.
Related Subjects
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GCSE Maths Revision Support
Past Papers
Board-specific papers from AQA, Edexcel, and OCR.
Revision Videos
15-minute concept deep-dives and paper walk-throughs.
Worksheets
Topic-specific worksheets with full marking schemes.
Exam Tips
Articles on common pitfalls and time management.
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Frequently Asked Questions
We provide specific revision tracks for AQA, Edexcel, OCR, and WJEC Eduqas. Each track is mapped to the latest specification released by the board.
No. For most boards, Paper 1 is non-calculator, while Papers 2 and 3 require a scientific calculator. We have specific non-calculator revision sets available.
We provide specific revision tracks for AQA, Edexcel, OCR, and WJEC Eduqas. Each track is mapped to the latest specification released by the board.
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