plumiDNA profiling: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 6.5.3 DNA profiling, 2019–2025, with mark schemes and examiner’s reports where available.
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Q2(b)(i)
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All 7 questions on DNA profiling, as a list
- October 2024, Unit 4, Q2(b)(i) (1 mark): Which type of enzyme is used to produce DNA fragments? (1) A integrase B restriction enzyme C reverse transcriptase D RUBISCO
- October 2024, Unit 4, Q2(b)(ii) (3 marks): The results of the gel electrophoresis were used to identify the plants that contained the resistance genes. Deduce the types of plants that would have supplied
- June 2023, Unit 4, Q2(b)(ii) (3 marks): Describe how analysis of the DNA would show that these two other bears were female, and not related to each other or to Hank. (3)
- January 2023, Unit 4, Q7(b)(v) (3 marks): These birds are thought to be monogamous, which means that they only mate with one bird of the opposite sex. Birds are only monogamous if the ratio of male to f
- January 2022, Unit 4, Q5(c) (3 marks): Explain how the amplified mtDNA could be used to determine the genetic relationships between these two species of crow. (3)
- June 2021, Unit 4, Q4(b)(ii) (2 marks): Explain how DNA profiling could show that these lemurs originated from the lemurs on Madagascar. (2)
- January 2020, Unit 4, Q4(b)(iii) (3 marks): This moth was seen and a specimen collected in 1887. It was not seen again in the rainforests of Malaysia until 2017. The DNA of these recently rediscovered Ori
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