GCSE Combined Science vs GCSE Biology: which exam is right for you?
Combined Science covers biology, chemistry and physics in six shorter papers and is worth two GCSEs, graded on a 17-step scale from 9-9 to 1-1. GCSE Biology is one of the three separate sciences ('triple science'): more depth and extra content in two longer papers, worth one GCSE of its own. Both lead on to A-level sciences; triple science gives a stronger base for the top grades.
GCSE Combined Science vs GCSE Biology at a glance
| GCSE Combined Science | GCSE Biology | |
|---|---|---|
| Full name | GCSE Combined Science (9-1) Exam | GCSE Biology (9-1) Exam |
| Questions | AQA Trilogy: 6 written papers (2 biology, 2 chemistry, 2 physics), 70 marks each (420 marks in total). Edexcel 1SC0 and OCR Gateway J250: 6 papers of 60 marks each | AQA: 2 written papers, 100 marks each (200 marks in total). Edexcel 1BI0 is also 2 × 100 marks; OCR Gateway J247 is 2 × 90 marks |
| Time | AQA: 7 hours 30 minutes in total (6 × 1 hour 15 minutes). Edexcel and OCR Gateway: 6 × 1 hour 10 minutes | 3 hours 30 minutes in total (2 × 1 hour 45 minutes); the same for AQA, Edexcel and OCR |
| Grades and pass mark | Graded on a 17-point double scale from 9-9 to 1-1; 4-4 is a standard pass and 5-5 a strong pass. Boundaries are set after every exam series, so aim for 70% in practice | Grade 4 is a standard pass and grade 5 a strong pass. Boundaries are set after every exam series, so aim for 70% in practice |
| Format | Written exams, calculator allowed on every paper, and a physics equation sheet is provided with the physics papers in 2027. Foundation tier (1-1 to 5-5) or Higher tier (4-4 to 9-9, with an allowed 4-3); all six papers at the same tier | Written exam, calculator allowed on both papers. Foundation tier (grades 1 to 5) or Higher tier (grades 4 to 9), and both papers must be taken at the same tier |
| Cost | No fee for school and college students (the school pays). Private candidates pay the exam centre; fees vary by centre | No fee for school and college students (the school pays). Private candidates pay the exam centre; fees vary by centre |
| Languages | English | English |
| Where | At your school or college, or as a private candidate at an exam centre that accepts them | At your school or college, or as a private candidate at an exam centre that accepts them |
| Level | GCSE | GCSE |
What each exam covers
GCSE Combined Science
- Cell Biology and Organisation
- Infection, Response and Bioenergetics
- Homeostasis, Inheritance and Ecology
- Atoms, Bonding and Quantitative Chemistry
- Chemical Changes and Energy Changes
- Rates, Organic Chemistry and Earth's Resources
- Energy, Electricity, Particles and Radioactivity
- Forces, Waves and Magnetism
GCSE Biology
- Cell Biology
- Organisation
- Infection and Response
- Bioenergetics
- Homeostasis and Response
- Inheritance, Variation and Evolution
- Ecology
Which should you take?
Combined Science covers biology, chemistry and physics in six shorter papers and is worth two GCSEs, graded on a 17-step scale from 9-9 to 1-1. GCSE Biology is one of the three separate sciences ('triple science'): more depth and extra content in two longer papers, worth one GCSE of its own. Both lead on to A-level sciences; triple science gives a stronger base for the top grades.
Try both, free
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FAQ
What is the difference between GCSE Combined Science and GCSE Biology?
Combined Science covers biology, chemistry and physics in six shorter papers and is worth two GCSEs, graded on a 17-step scale from 9-9 to 1-1. GCSE Biology is one of the three separate sciences ('triple science'): more depth and extra content in two longer papers, worth one GCSE of its own. Both lead on to A-level sciences; triple science gives a stronger base for the top grades.
Which is harder, GCSE Combined Science or GCSE Biology?
GCSE Combined Science: aqa trilogy: 6 written papers (2 biology, 2 chemistry, 2 physics), 70 marks each (420 marks in total). edexcel 1sc0 and ocr gateway j250: 6 papers of 60 marks each in aqa: 7 hours 30 minutes in total (6 × 1 hour 15 minutes). edexcel and ocr gateway: 6 × 1 hour 10 minutes. GCSE Biology: aqa: 2 written papers, 100 marks each (200 marks in total). edexcel 1bi0 is also 2 × 100 marks; ocr gateway j247 is 2 × 90 marks in 3 hours 30 minutes in total (2 × 1 hour 45 minutes); the same for aqa, edexcel and ocr. The longer exam covers more ground, but the harder one is the one further from your daily work. Take both free practice tests to see where you stand.
Can I hold both GCSE Combined Science and GCSE Biology?
Yes. Most students take several subjects in the same exam series, and the timetable is built so the papers don't clash. Our plans are per subject, so add the subjects you need.
How do I prepare for GCSE Combined Science and GCSE Biology?
Start with the free practice test for each, then study by topic. Premium is per exam (£29 a month each), so most people start with the exam they'll sit first and add the second when they're ready.
More comparisons
Exam details are summarized from the exam boards' published information as of November 2026. Confirm with the exam boards before you book. Kennington College is not affiliated with any exam board or with Ofqual.