Official past papers and mark schemes for Edexcel International A Level Biology (YBI11) are free from Pearson Edexcel. We link to them rather than copy them, so you always get the board's own, up-to-date files.
Look for these paper codes: WBI11/01, WBI12/01 and WBI13/01 (Units 1 to 3, the International AS), WBI14/01, WBI15/01 and WBI16/01 (Units 4 to 6).
Pearson says only teachers can open the most recent papers, from roughly the last year, so schools can use them as mocks. Ask your teacher if the newest series is locked. Clock it with SCI is not affiliated with Pearson Edexcel and does not host any past papers.
| Paper | Time | Marks | What it tests |
|---|---|---|---|
| Unit 1: Molecules, Diet, Transport and Health | 1 hour 30 minutes | 80 marks, 20% of the IAL (40% of the IAS) | Topic 1 Molecules, Transport and Health and Topic 2 Membranes, Proteins, DNA and Gene Expression |
| Unit 2: Cells, Development, Biodiversity and Conservation | 1 hour 30 minutes | 80 marks, 20% of the IAL (40% of the IAS) | Topic 3 Cell Structure, Reproduction and Development and Topic 4 Plant Structure and Function, Biodiversity and Conservation |
| Unit 3: Practical Skills in Biology I | 1 hour 20 minutes | 50 marks, 10% of the IAL (20% of the IAS) | A written paper on practical skills from Units 1 and 2 (core practicals 1 to 9): planning, measurements and processing results |
| Unit 4: Energy, Environment, Microbiology and Immunity | 1 hour 45 minutes | 90 marks, 20% of the IAL | Topic 5 Energy Flow, Ecosystems and the Environment and Topic 6 Microbiology, Immunity and Forensics, with some synoptic questions on Units 1 and 2 |
| Unit 5: Respiration, Internal Environment, Coordination and Gene Technology | 1 hour 45 minutes | 90 marks, 20% of the IAL | Topic 7 Respiration, Muscles and the Internal Environment and Topic 8 Coordination, Response and Gene Technology. One 20-mark question is based on a scientific article released before the exam. |
| Unit 6: Practical Skills in Biology II | 1 hour 20 minutes | 50 marks, 10% of the IAL | A written paper on practical skills from all units (core practicals 1 to 18), including planning an investigation to test a hypothesis |
From the Edexcel specification (International AS and A Level Biology specification (PDF)). Always check the latest version with your teacher before the exam.
