Cambridge O Level Biology (5090) Paper 21, October/November 2025. Read the question paper free and work through it with an AI tutor that explains every question step by step.
| Exam board | Cambridge International Education |
|---|---|
| Qualification | Cambridge O Level |
| Subject | Biology |
| Syllabus code | 5090 |
| Paper | Paper 21 (5090/21) |
| Exam series | October/November 2025 · all 2025 papers |
| Questions | 8 |
| AI explanations | Available for every question |
The questions in this paper cover these Biology syllabus chapters:
| Topic | Questions |
|---|---|
| Chapter 1: Cells | 1 |
| Chapter 3: Movement into and out of cells | 1 |
| Chapter 5: Enzymes | 1 |
| Chapter 6: Plant nutrition | 1 |
| Chapter 12: Disease and immunity | 1 |
| Chapter 14: Coordination and control | 1 |
| Chapter 16: Development of organisms and continuity of life | 1 |
| Chapter 18: Biotechnology and genetic modification | 1 |
Every question in 5090 Biology Paper 21 — Oct/Nov 2025 and the syllabus topic it tests. Ask the AI tutor about any of them by number, for example "Question 1".
| Question | Topic |
|---|---|
| Question 1 | Chapter 16: Development of organisms and continuity of life |
| Question 2 | Chapter 1: Cells |
| Question 3 | Chapter 3: Movement into and out of cells |
| Question 4 | Chapter 6: Plant nutrition |
| Question 5 | Chapter 5: Enzymes |
| Question 6 | Chapter 18: Biotechnology and genetic modification |
| Question 7 | Chapter 12: Disease and immunity |
| Question 8 | Chapter 14: Coordination and control |
This paper tests 8 syllabus topics: Cells (1 question), Movement into and out of cells (1 question), Enzymes (1 question), Plant nutrition (1 question), Disease and immunity (1 question), Coordination and control (1 question), Development of organisms and continuity of life (1 question), Biotechnology and genetic modification (1 question).
Yes. Open the paper on Aixampapers and ask the AI tutor about any question: it explains each one step by step, written to what Cambridge examiners give marks for.
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