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
-
Which three phases make up interphase in the cell cycle?
- G1, G2, M
- S, G2, M
- G0, G1, S
- G1, S, G2
-
In which phase of interphase does DNA replication occur?
- G2 phase
- G1 phase
- S phase
- M phase
-
Which phase of mitosis has chromosomes lined up along the equator of the spindle?
- Telophase
- Metaphase
- Anaphase
- Prophase
-
In which phase do sister chromatids separate?
- Prophase
- Metaphase
- Anaphase
- Interphase
-
What is the division of cytoplasm following mitosis called?
- Karyokinesis
- Metaphase
- Interphase
- Cytokinesis
-
A diploid cell has 12 chromosomes. How many chromosomes does each daughter cell have after mitosis?
- 6
- 12
- 3
- 24
-
In a sample of 300 cells, 60 are in mitosis. What is the mitotic index as a percentage?
- 5%
- 60%
- 80%
- 20%
-
Why is mitosis important for tissue growth in multicellular organisms?
- Halves chromosome number
- Produces identical cells
- Produces haploid cells
- Increases genetic variation
-
Which cell cycle checkpoint verifies DNA integrity before DNA replication starts?
- Metaphase checkpoint
- G1 checkpoint
- G2 checkpoint
- S checkpoint
-
Why are most cells in a root tip squash seen in interphase?
- Stain targets interphase
- Fastest division stage
- Longest phase duration
- Cells freeze naturally
-
What type of mutated genes cause uncontrolled cell division in cancer?
- Cell cycle regulators
- Ribosomal RNA genes
- Mitochondrial genes
- Structural protein genes
-
A cell has 2n = 8. How many chromosomes line up at the metaphase plate of mitosis?
- 16
- 2
- 4
- 8
-
What are spindle fibres made of?
- Microtubules
- Actin filaments only
- Intermediate filaments only
- Cellulose
-
What is the primary purpose of DNA replication during S phase?
- Double DNA content
- Halve genetic material
- Synthesise cell walls
- Separate sister chromatids
-
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%
-
In which phase do chromosomes decondense and a nuclear envelope reform around each set?
- Prophase
- Anaphase
- Metaphase
- Telophase
-
Which structures separate during anaphase of mitosis to ensure genetic identity?
- Non-sister chromatids
- Sister chromatids
- Bivalents
- Homologous chromosomes
-
What is seen in root tip cells during anaphase of mitosis?
- Nuclear envelope forming
- Chromatids moving apart
- Chromosomes at equator
- Chromatin condensing
-
How many daughter nuclei does one mitotic division produce?
- One
- Two
- Eight
- Four
-
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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