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DP IB Biology: HL

Topic Questions

Home / IB / Biology: HL / DP / Topic Questions / 2. Molecular Biology / 2.5 Nucleic Acids: Structure & DNA Replication / Multiple Choice: Paper 1


2.5 Nucleic Acids: Structure & DNA Replication

Question 1

Marks: 1

The following diagram represents the structure of a nucleotide.2-5-e-2

Which row of the following table correctly identifies all the components of this nucleotide?

  1 2 3
A. Adenine Pentose sugar Phosphate group
B. Phosphate group Adenine Pentose sugar
C. Pentose sugar Phosphate group Adenine
D. Phosphate group Pentose sugar Adenine
    Choose your answer
      

    Question 2

    Marks: 1

    Which of the following statements only apply to RNA?

    I. The molecule is in the shape of a double helix, with antiparallel strands

    II. The four bases are adenine, cytosine, guanine, thymine

    III. Ribose is present as the pentose sugar in its nucleotides

    IV. It is a polymer formed by the linkage of many nucleotides

    • I and III

    • I, II and IV

    • II, III and IV

    • III and IV

    Choose your answer
      

    Question 3

    Marks: 1

    The following diagram shows a section of a DNA molecule.

    2-5easyq3

    Which of these base pairs are not correct?

    • None

    • 1

    • 2

    • 3

    Choose your answer
      
    Key Concepts
    Double Helix Structure

    Question 4

    Marks: 1

    Which of the following is not a reason why molecular models helped Crick and Watson discover the structure of DNA?

    • The DNA model could be adapted as their research delivered more information

    • It reduced the amount of time spent on "trial and error" cycles and enabled them to come to a faster conclusion

    • It represented their concepts of the three dimensional structure of DNA in order for further testing

    • It enabled Crick and Watson to communicate their findings about the structure of DNA in a clear, visible way

    Choose your answer
      
    Key Concepts
    Crick & Watson

    Question 5

    Marks: 1

    The diagram shows the outcomes from four different models of DNA replication after one nuclear division. The parent DNA is shown in black and the newly synthesised DNA is shown in grey.

    2-5easyq5

    Which diagram represents semi-conservative DNA replication?

    • 1

    • 2

    • 3

    • 4

    Choose your answer