plumiMeselson and Stahl's experiment: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 2.4.3 Meselson and Stahl's experiment, 2019–2025, with mark schemes and examiner’s reports where available.
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Q5(c)
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All 7 questions on Meselson and Stahl's experiment, as a list
- January 2025, AS Unit 1, Q5(c) (6 marks): Meselson and Stahl used mononucleotides made with either heavy nitrogen (N15) or light nitrogen (N14) in their experiments. The flowchart summarises part of one
- October 2022, AS Unit 1, Q8(c)(i) (3 marks): Complete the diagram to show the results of this investigation. Use the dotted lines to help you position the bands on the diagram. The first one has been done
- October 2022, AS Unit 1, Q8(c)(ii) (2 marks): One competing theory was the conservative theory. The diagram shows the conservative theory for the replication of DNA. after stage 1 after stage 2 Complete the
- October 2022, AS Unit 1, Q8(c)(iii) (2 marks): Another competing theory was the dispersive theory. The diagram shows the dispersive theory. after stage 1 after stage 2 Complete the diagram to show the positi
- October 2020, AS Unit 1, Q4(b)(i) (5 marks): Complete the diagram to show the results of this experiment. Use the dotted lines to help you to position the bands on the diagram. The first one has been done
- October 2020, AS Unit 1, Q4(b)(ii) (1 mark): The experiments of Meselson and Stahl disproved the dispersive theory of DNA replication. The diagram shows the expected results if the dispersive theory was co
- June 2019, AS Unit 1, Q4(b) (3 marks): The flow chart summarises part of one experiment performed by Meselson and Stahl. Stage 1 Bacteria grown for several generations in culture medium containing he
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