Practise 586 real Biology questions from 2021 to 2026. See the correct answer and a clear explanation the moment you answer.
O Level Biology (Cambridge (CAIE) 5090) is examined in the May/June and Oct/Nov series. Tayyari Karo has real questions from 2021 to 2026 across Paper 1, Paper 2, Paper 3, Paper 4, covering topics such as Enzymes, coordination and response, Respiration, Disease and Transport in plants. The fastest way to improve is to work through real questions and read why each answer is right.
Tayyari Karo collects the real Cambridge (CAIE) Biology questions in one place, sorted by paper and topic. 440 of them are multiple choice and marked instantly, and the rest are structured questions with a full model answer.
These are real past-paper questions. Think of your answer first, then open the explanation.
Which structures are present in plant cells but not in animal cells?
Answer: B. cell wall, chloroplasts, sap vacuole
A piece of plant tissue is transferred from a beaker of water into a concentrated sugar solution. Which row describes what happens?
Answer: C. out of the cells / decreases
What is a correct description of enzymes?
Answer: B. biological catalysts made of proteins
A farmer uses a mattock to weed her crop. (a) Explain how the muscles and bones in her right arm help her to lift the tool. (b) The farmer has not used any insecticides or artificial fertilisers. Explain ways in which this may help the local environment.
(a) Named bones and location; antagonistic muscles; biceps contracts (shortens) pulling radius/ulna towards humerus; triceps relaxes; hinge joint at elbow. (b) No insecticide run-off/leaching into water; no harm to aquatic insects/pollinators; no bioaccumulation; no algal bloom/eutrophication from fertilisers; greater biodiversity / soil structure maintained with organic alternatives.
Number of questions available for each paper.
| Session | Paper 1 | Paper 2 | Paper 3 | Paper 4 |
|---|---|---|---|---|
| May/June 2026 | 40 | 9 | 2 | 2 |
| May/June 2025 | 40 | 8 | 3 | 3 |
| Oct/Nov 2025 | 40 | 8 | 3 | 3 |
| May/June 2024 | 40 | 6 | 3 | 3 |
| Oct/Nov 2024 | 40 | 7 | 3 | 3 |
| May/June 2023 | 40 | 7 | 2 | 2 |
| Oct/Nov 2023 | 40 | 8 | 3 | 3 |
| May/June 2022 | 40 | 9 | 2 | 2 |
| Oct/Nov 2022 | 40 | 9 | 3 | 3 |
| May/June 2021 | 40 | 9 | 2 | 3 |
| Oct/Nov 2021 | 40 | 9 | 2 | 2 |
Yes. Every question comes from a real Cambridge (CAIE) Biology (5090) paper from 2021 to 2026. Each one shows the year, session and paper it came from.
You can start free with no signup. A small set of papers per subject is free, and Premium unlocks every paper, the full question bank and the paper PDFs.
Yes. Every question gives you the correct answer straight away with a short explanation, so you learn from mistakes instead of just marking them.
Paper 1, Paper 2, Paper 3, Paper 4 across the May/June and Oct/Nov sessions. Multiple-choice questions are marked automatically, and structured questions show a full model answer.
