Biology SL and HL – for the IB Diploma Programme
Teacher Information Pack: how Biology is assessed in the IB Diploma Programme, with links to the official documents.
- Qualification
- IB Diploma Programme subject
- Group
- 4 – Sciences
- Students, May 2025
- 55,041 (HL 33,102, SL 21,939)
- Last checked
- 2026-10-20
Entries: IB May 2025 statistical bulletin.
Plan the whole year in the free Year Planner: for the IB Diploma Programme · for the IB Diploma Programme
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Assessment by level
Biology SL
150 teaching hours · first exams 2025
| Paper | Time | Marks | Weight |
|---|---|---|---|
| Paper 1: Paper 1A (multiple choice) and 1B (data-based questions) | 1 h 30 min | – | 36% |
| Paper 2: Short-answer and extended-response questions | 1 h 30 min | – | 44% |
| Internal assessment: Scientific investigation Non-exam assessment | not stated | – | 20% |
Biology HL
240 teaching hours · first exams 2025
| Paper | Time | Marks | Weight |
|---|---|---|---|
| Paper 1: Paper 1A (multiple choice) and 1B (data-based questions) | 2 h | – | 36% |
| Paper 2: Short-answer and extended-response questions | 2 h 30 min | – | 44% |
| Internal assessment: Scientific investigation Non-exam assessment | not stated | – | 20% |
Official documents
More packs
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Exam details checked against the IB subject brief or guide on 2026-10-20. Always check the current version on the IB website. We store facts only (codes, papers, times, marks, weightings) with summaries in our own words; no syllabus, guide or paper text is reproduced, and past papers are linked, never re-hosted.
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