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DP IB Biology: HL

Topic Questions

Home / IB / Biology: HL / DP / Topic Questions / 1. Cell Biology / 1.4 Cells: Division / Structured Questions: Paper 2


1.4 Cells: Division

Question 1a

Marks: 1
a)

State which structure is formed in animal cells by the pinching of the plasma membrane during cytokinesis.

[1 mark]

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    Key Concepts
    Cytokinesis

    Question 1b

    Marks: 2
    b)

    Define mitosis. 

    [2 marks]

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      Key Concepts
      Phases of Mitosis

      Question 1c

      Marks: 3
      c)

      The drawings below show a cell during different stages of mitosis.

      1-4-e-1c-paper-2

       
      List the stages P, Q, R, S and T in the correct sequence.

      [3 marks]

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        Key Concepts
        Phases of Mitosis

        Question 1d

        Marks: 1
        d)

        Cell M contains 74 chromosomes. It divides by mitosis. 

        State how many chromosomes the daughter cells will contain.

        [1 mark]

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          Key Concepts
          Phases of Mitosis

          Question 2a

          Marks: 1
          a)

          State which proteins are used to control the cell cycle. 

          [1 mark]

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            Key Concepts
            Cyclins

            Question 2b

            Marks: 1
            b)

            The diagram below represents the different phases of the cell cycle.

            1-4-e-2b-paper-2

             

            State all the letters in the diagram that represent the phases of interphase.

            [1 mark]

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              Key Concepts
              Interphase

              Question 2c

              Marks: 1
              c)

              The tumour suppressor gene TP53 codes for a protein that interrupts the cell cycle if there is any damage to the DNA and prevents the copying of damaged DNA. 

              State which stage of the cell cycle this gene would interrupt.

              [1 mark]

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                Key Concepts
                Interphase

                Question 2d

                Marks: 2
                d)

                Define oncogene. 

                [2 marks]

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                  Key Concepts
                  Tumour Formation

                  Question 3a

                  Marks: 3
                  a)

                  The diagram below shows two different stages of mitosis.

                  1-4-e-3a-paper-2

                  Identify structures M, N and O.

                  [3 marks]

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                    Key Concepts
                    Chromosomes Condense

                    Question 3b

                    Marks: 3
                    b)

                    List three reasons why cells will undergo mitosis.

                    [3 marks]

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                      Key Concepts
                      Phases of Mitosis

                      Question 3c

                      Marks: 1
                      c)

                      State the process that occurs during prophase that enables chromosomes to condense.

                      [1 mark]

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                        Question 3d

                        Marks: 2
                        d)

                        List four examples of mutagens.

                        [2 marks]

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                          Key Concepts
                          Tumour Formation

                          Question 4a

                          Marks: 2
                          a)

                          The diagram below shows some grasshopper cells.

                          d2YSTw69_e-4a

                          State the stages of the cell cycle shown by X and Y.

                          [2 marks]

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                            Question 4b

                            Marks: 3
                            b)

                            Outline the events occurring during the stage shown as Z in part (a).

                            [3 marks]

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                              Key Concepts
                              Phases of Mitosis

                              Question 4c

                              Marks: 2
                              c)

                              The diagram below shows onion cells from the root tip.e-4c

                              Calculate the mitotic index for this root tip.

                              [2 marks]

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                                Question 4d

                                Marks: 1
                                d)

                                Doctors use the mitotic index when examining tumours.

                                Suggest what a high mitotic index would indicate to a doctor.

                                [1 mark]

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                                  Key Concepts
                                  Tumour Formation

                                  Question 5a

                                  Marks: 3

                                  One mark is available for clarity of communication throughout this question.

                                  a)

                                  Outline how the role of cyclins in the cell cycle was discovered. 

                                  [3 marks]

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                                    Key Concepts
                                    Cyclins

                                    Question 5b

                                    Marks: 6
                                    b)

                                    Budding yeast cells complete a cell cycle in 90 minutes.

                                    Outline the stages in the cell cycle that result in the development of new yeast cells. 

                                    [6 marks]

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                                      Question 5c

                                      Marks: 6
                                      c)

                                      Compare and contrast cell division of prokaryotic and eukaryotic cells. 

                                      [6 marks]

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