plumiDNA sequencing and its uses: OCR A‑Level Biology A questions
OCR A-Level Biology A past-paper questions on 6.1.3.1 DNA sequencing and its uses, 2016–2025, with mark schemes and examiner’s reports where available.
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Open the full PDFYour answerQ18(b)(i)
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All 14 questions on DNA sequencing and its uses, as a list
- June 2025, Paper 2, Q11 (1 mark): Which statement about DNA sequencing is not correct? A High-throughput sequencing allows DNA to be sequenced quickly. B Nucleotides are added to a growing stran
- June 2024, Paper 2, Q18(b)(i) (6 marks): Synthetic biology involves re-designing organisms for useful purposes. One such purpose could be the production of useful proteins. Proteins can be produced by
- June 2024, Paper 2, Q18(b)(ii) (1 mark): Suggest why some people might be concerned about the increase of synthetic biology. [1]
- June 2023, Paper 2, Q19(e) (2 marks): Plants and microorganisms have traditionally been used as sources of new medicines. Synthetic biology could play a major role in the development of new medicine
- June 2023, Paper 3, Q3(b) (3 marks): Humans have been selectively breeding maize as a crop plant for thousands of years, which has resulted in many different varieties of maize. Different varieties
- November 2021, Paper 2, Q9 (1 mark): Which of the following substances is not required in DNA sequencing? A DNA polymerase B primers C RNA nucleotides D terminator bases Your answer [1]
- November 2021, Paper 2, Q11 (1 mark): Gene sequencing has a number of uses. Which of the following is not a use of gene sequencing? A determining the amino acid sequence of a polypeptide B the class
- November 2021, Paper 2, Q16(d) (3 marks): DNA sequencing has allowed scientists to create a strain of Escherichia coli bacteria with an entirely artificial genome. Complete the passage using the most ap
- November 2021, Paper 3, Q1(c)(iii) (2 marks): Explain how DNA sequencing could help scientists understand how the West Highland Terrier’s genes affect its probability of developing CPF. [2]
- June 2018, Paper 2, Q21(a) (1 mark): Define the term DNA sequencing. [1]
- June 2018, Paper 2, Q21(b) (2 marks): The speed at which DNA can be sequenced has been increasing rapidly since the introduction of DNA sequencing. The length of DNA that can be sequenced in a given
- June 2018, Paper 2, Q21(c)(i) (1 mark): State one development, other than nanopore technology, that has led to an increase in the speed at which DNA can be sequenced. [1]
- June 2018, Paper 2, Q21(c)(iii) (2 marks): Explain how DNA sequencing allows the sequence of amino acids in a polypeptide to be predicted. [2]
- June 2018, Paper 2, Q21(d) (4 marks): DNA sequencing can be used to determine the genome of an entire organism. The first organism to have its entire genome sequenced was a virus. Ebola is a virus t
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