Lesson 3.3.3

3.3.3 Mitosis and the cell cycle Quiz: Pearson Edexcel Biology, Unit 3

20 questions

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Lesson 3.3.3, Mitosis and the cell cycle: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 3: Voice of the Genome, written with Revision Ninja.

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The 20 questions

  1. Which three phases make up interphase in the cell cycle?

    • G1, G2, M
    • S, G2, M
    • G0, G1, S
    • G1, S, G2
  2. In which phase of interphase does DNA replication occur?

    • G2 phase
    • G1 phase
    • S phase
    • M phase
  3. Which phase of mitosis has chromosomes lined up along the equator of the spindle?

    • Telophase
    • Metaphase
    • Anaphase
    • Prophase
  4. In which phase do sister chromatids separate?

    • Prophase
    • Metaphase
    • Anaphase
    • Interphase
  5. What is the division of cytoplasm following mitosis called?

    • Karyokinesis
    • Metaphase
    • Interphase
    • Cytokinesis
  6. A diploid cell has 12 chromosomes. How many chromosomes does each daughter cell have after mitosis?

    • 6
    • 12
    • 3
    • 24
  7. In a sample of 300 cells, 60 are in mitosis. What is the mitotic index as a percentage?

    • 5%
    • 60%
    • 80%
    • 20%
  8. Why is mitosis important for tissue growth in multicellular organisms?

    • Halves chromosome number
    • Produces identical cells
    • Produces haploid cells
    • Increases genetic variation
  9. Which cell cycle checkpoint verifies DNA integrity before DNA replication starts?

    • Metaphase checkpoint
    • G1 checkpoint
    • G2 checkpoint
    • S checkpoint
  10. Why are most cells in a root tip squash seen in interphase?

    • Stain targets interphase
    • Fastest division stage
    • Longest phase duration
    • Cells freeze naturally
  11. What type of mutated genes cause uncontrolled cell division in cancer?

    • Cell cycle regulators
    • Ribosomal RNA genes
    • Mitochondrial genes
    • Structural protein genes
  12. A cell has 2n = 8. How many chromosomes line up at the metaphase plate of mitosis?

    • 16
    • 2
    • 4
    • 8
  13. What are spindle fibres made of?

    • Microtubules
    • Actin filaments only
    • Intermediate filaments only
    • Cellulose
  14. What is the primary purpose of DNA replication during S phase?

    • Double DNA content
    • Halve genetic material
    • Synthesise cell walls
    • Separate sister chromatids
  15. A cell cycle lasts 20 hours and mitosis takes 1 hour. What percentage of the cycle is spent in mitosis?

    • 50%
    • 5%
    • 20%
    • 0.5%
  16. In which phase do chromosomes decondense and a nuclear envelope reform around each set?

    • Prophase
    • Anaphase
    • Metaphase
    • Telophase
  17. Which structures separate during anaphase of mitosis to ensure genetic identity?

    • Non-sister chromatids
    • Sister chromatids
    • Bivalents
    • Homologous chromosomes
  18. What is seen in root tip cells during anaphase of mitosis?

    • Nuclear envelope forming
    • Chromatids moving apart
    • Chromosomes at equator
    • Chromatin condensing
  19. How many daughter nuclei does one mitotic division produce?

    • One
    • Two
    • Eight
    • Four
  20. What is the main genetic outcome of cell division by mitosis?

    • Genetically identical cells
    • Increased chromosome number
    • Genetically varied gametes
    • Haploid daughter cells

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