plumiCAIE A‑Level Biology questions by topic
Every question from the CAIE AS & A Level Biology (9700) papers Cambridge International publishes, June 2024 and the specimen papers, part by part. Cambridge keeps its other papers on its School Support Hub, for schools. Filter by topic or paper, open the mark scheme under any question, and download a set as a PDF.
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Q1(a)
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Q1(b)
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Q1(c)
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Q2(a)(i)
The whole paper ↗![June 2024 Paper 4, question 2(a)(i): Identify one similarity and one difference between paracrine cell signalling and cell signalling that occurs as part of the endocrine system. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-02-ai-qp.webp)
Q2(a)(ii)
The whole paper ↗![June 2024 Paper 4, question 2(a)(ii): Explain why a neurotransmitter such as acetylcholine could be described as a paracrine signalling molecule. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-02-aii-qp.webp)
Q2(b)
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Q2(c)
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Q3(a)
The whole paper ↗![June 2024 Paper 4, question 3(a): Describe the mechanism by which stomata open in sunlight. [4]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-03-a-qp.webp)
Q3(b)(i)
The whole paper ↗![June 2024 Paper 4, question 3(b)(i): With reference to Fig. 3.1, describe the relationship between the concentration of ABA in the xylem sap and stomatal conductance. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-03-bi-qp.webp)
Q3(b)(ii)
The whole paper ↗![June 2024 Paper 4, question 3(b)(ii): Suggest explanations for the results shown in Fig. 3.1. [4]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-03-bii-qp.webp)
Q3(c)
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Q4(a)
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Q4(b)(i)
The whole paper ↗![June 2024 Paper 4, question 4(b)(i): Outline and explain the steps that occur in PCR. [4]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-04-bi-qp.webp)
Q4(b)(ii)
The whole paper ↗![June 2024 Paper 4, question 4(b)(ii): Suggest how the researchers were able to discover suitable sequences for the primers. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-04-bii-qp.webp)
Q4(c)(i)
The whole paper ↗![June 2024 Paper 4, question 4(c)(i): State the letter of the curve with the highest starting concentration of DNA. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-04-ci-qp.webp)
Q4(c)(ii)
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Q4(d)(i)
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Q4(d)(ii)
The whole paper ↗![June 2024 Paper 4, question 4(d)(ii): Suggest why the gene for green fluorescent protein is sometimes transferred in addition to the desired gene in genetic engineering. [1] [Total: 15]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-04-dii-qp.webp)
Q5(a)(i)
The whole paper ↗![June 2024 Paper 4, question 5(a)(i): A and B are areas of the chloroplast. Name areas A and B. A B [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/970041-jun24-05-ai-qp.webp)
Q5(a)(ii)
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