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Structure of nucleic acids and replication of DNA: CAIE A‑Level Biology questions

Every CAIE A-Level Biology exam question on 6.1 Structure of nucleic acids and replication of DNA, June 2024 and the specimen papers, with its mark scheme and examiner’s report.

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240 questions

  1. Q21

    June 2024 · Paper 1

    1 mark6.1 Structure of nucleic acids and replication of DNA
    The whole paper ↗
    June 2024 Paper 1, question 21: The diagrams show the chemical structure of four bases. O NH2 C C CH3 N HN C C N HC C CH C CH N N N O H H 1 2 NH2 O C C N N CH C NH HC C CH C C N N O N NH2 H H

  2. Q25

    Specimen · Paper 1

    1 mark6.1 Structure of nucleic acids and replication of DNA
    The whole paper ↗
    Specimen Paper 1, question 25: Which statements about mRNA are correct? 1 mRNA can form base pairs. 2 mRNA can form hydrogen bonds. 3 mRNA is single stranded. A 1, 2 and 3 B 1 and 2 only C 1

  3. Q26

    Specimen · Paper 1

    1 mark6.1 Structure of nucleic acids and replication of DNA
    The whole paper ↗
    Specimen Paper 1, question 26: The table shows the role of four different proteins involved in DNA replication. protein helicase topoisomerase single-strand DNA polymerase binding protein rol

  4. Q27

    Specimen · Paper 1

    1 mark6.1 Structure of nucleic acids and replication of DNA
    The whole paper ↗
    Specimen Paper 1, question 27: Which type of sugar and which type of bond are found in a DNA molecule? type of sugar type of bond A disaccharide glycosidic B disaccharide phosphodiester C mon

  5. Q6(a)

    Specimen · Paper 2

    6 marks6.1 Structure of nucleic acids and replication of DNA
    The whole paper ↗
    Specimen Paper 2, question 6(a): Steps in DNA replication are outlined in Fig. 6.1. Complete Fig. 6.1 by filling in the gaps using the most appropriate terms. 1 Helicase enzyme allows the DNA d
All 5 questions on Structure of nucleic acids and replication of DNA, as a list
  1. June 2024, Paper 1, Q21 (1 mark): The diagrams show the chemical structure of four bases. O NH2 C C CH3 N HN C C N HC C CH C CH N N N O H H 1 2 NH2 O C C N N CH C NH HC C CH C C N N O N NH2 H H
  2. Specimen, Paper 1, Q25 (1 mark): Which statements about mRNA are correct? 1 mRNA can form base pairs. 2 mRNA can form hydrogen bonds. 3 mRNA is single stranded. A 1, 2 and 3 B 1 and 2 only C 1
  3. Specimen, Paper 1, Q26 (1 mark): The table shows the role of four different proteins involved in DNA replication. protein helicase topoisomerase single-strand DNA polymerase binding protein rol
  4. Specimen, Paper 1, Q27 (1 mark): Which type of sugar and which type of bond are found in a DNA molecule? type of sugar type of bond A disaccharide glycosidic B disaccharide phosphodiester C mon
  5. Specimen, Paper 2, Q6(a) (6 marks): Steps in DNA replication are outlined in Fig. 6.1. Complete Fig. 6.1 by filling in the gaps using the most appropriate terms. 1 Helicase enzyme allows the DNA d

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