Practise 659 real Biology questions from 2021 to 2026. See the correct answer and a clear explanation the moment you answer.
A Level Biology (Cambridge (CAIE) 9700) 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, Paper 5, covering topics such as Cell structure, Biological molecules, Transport in mammals, Transport in plants and Nucleic acids and protein synthesis. 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. 438 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 cell structures contain nucleic acid?
1 Golgi body
2 lysosome
3 mitochondria
4 ribosomes
Answer: D. 3 and 4
Mitochondria contain their own circular DNA and ribosomes contain rRNA; the Golgi body and lysosomes do not contain nucleic acid.
Which pair of molecules only includes macromolecules that can be found in animal cells?
Answer: B. collagen and glycogen
Amylopectin and starch are plant-only polysaccharides, and deoxyribose and sucrose are not macromolecules; collagen (protein) and glycogen (polysaccharide) are both macromolecules found in animal cells.
At which stages of mitosis are chromosomes composed of two chromatids that are held together by a centromere?
Answer: C. metaphase and prophase
Sister chromatids remain joined at the centromere through prophase and metaphase; the centromere splits at the start of anaphase, after which chromatids move apart as separate chromosomes.
All organisms respire to release energy from energy-rich molecules such as glucose.
(a)(i) Anabolic reactions use energy. State two examples of anabolic reactions occurring in living organisms. [2]
(ii) Describe and explain the use of ATP in glycolysis. [3]
(b) Some factory workers in the early 20th century were exposed to chemical X and experienced serious side-effects: decreased production of ATP; increased lipid metabolism with weight loss; increased production of pyruvate and lactate; excess heat energy release causing a rise in body temperature, which can be fatal. Chemical X increases the permeability of the inner mitochondrial membrane to protons (hydrogen ions), causing some protons to leak out into the matrix.
(i) Explain why people exposed to chemical X show decreased production of ATP and increased lipid metabolism. [3]
(ii) Suggest and explain why chemical X causes increased production of pyruvate and lactate. [2]
(iii) Suggest why excess heat energy is released. [1]
(a)(i) Any two examples showing synthesis from smaller units, e.g. DNA replication/transcription; making/building up a named protein; making/building up a named lipid/triglyceride/phospholipid; making/building up a named carbohydrate/polysaccharide; phosphorylation.
(ii) Any three of: ATP phosphorylates glucose, converting it to glucose/fructose/hexose phosphate; a second phosphorylation converts glucose/fructose/hexose phosphate to fructose/hexose bisphosphate; phosphorylating glucose means it cannot leave the cell; phosphorylation activates/increases the energy of/decreases the stability of glucose, priming it for further breakdown. …
The full model answer is in the app.
Number of questions available for each paper.
| Session | Paper 1 | Paper 2 | Paper 3 | Paper 4 | Paper 5 |
|---|---|---|---|---|---|
| May/June 2026 | 40 | 6 | 2 | 10 | 2 |
| May/June 2025 | 40 | 6 | 2 | 10 | 2 |
| Oct/Nov 2025 | 40 | 6 | 2 | 10 | 2 |
| May/June 2024 | 40 | 6 | 2 | 10 | 3 |
| Oct/Nov 2024 | 40 | 6 | 2 | 10 | 2 |
| May/June 2023 | 40 | 6 | 2 | 10 | 2 |
| Oct/Nov 2023 | 38 | 6 | 2 | 10 | 2 |
| May/June 2022 | 40 | 6 | 2 | 10 | 2 |
| Oct/Nov 2022 | 40 | 6 | 2 | 10 | 2 |
| May/June 2021 | 40 | 6 | 2 | 10 | 2 |
| Oct/Nov 2021 | 40 | 6 | 2 | 10 | 2 |
Yes. Every question comes from a real Cambridge (CAIE) Biology (9700) 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, Paper 5 across the May/June and Oct/Nov sessions. Multiple-choice questions are marked automatically, and structured questions show a full model answer.
