Lesson 2.1.6a
2.1.6a Cell cycle, mitosis and meiosis Quiz: OCR Biology, Unit 1
20 questions
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Lesson 2.1.6a, Cell cycle, mitosis and meiosis: 20 multiple choice questions for the OCR Biology (H020), Unit 1: Foundations in biology, written with Revision Ninja.
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The 20 questions
-
Which three phases comprise interphase in the cell cycle?
- G1, S, G2
- G1, S, M
- Prophase, metaphase, anaphase
- G0, G1, G2
-
DNA is replicated during which phase of the cell cycle?
- S phase
- Metaphase
- Cytokinesis
- G1 phase
-
What is the main function of cell cycle checkpoints?
- Regulating cycle progression
- Synthesising cell proteins
- Increasing cell volume
- Replicating cell DNA
-
In mitosis, sister chromatids separate during:
- Telophase
- Anaphase
- Prophase
- Metaphase
-
Where do chromosomes align during metaphase of mitosis?
- At the poles
- Inside the nucleolus
- Across the envelope
- At the equator
-
The nuclear envelope reforms during:
- Telophase
- Anaphase
- Metaphase
- Prophase
-
What type of cells are produced at the end of meiosis?
- Four diploid cells
- Four haploid cells
- Two diploid cells
- Two haploid cells
-
Homologous chromosomes pair up during:
- Metaphase 2 of meiosis
- Prophase 1 of meiosis
- Telophase 1 of meiosis
- Anaphase 2 of meiosis
-
Crossing over between non-sister chromatids occurs in:
- Metaphase 1 of meiosis
- Prophase 1 of meiosis
- Telophase 2 of meiosis
- Anaphase 2 of meiosis
-
Independent assortment of homologous pairs occurs in:
- Metaphase 1 of meiosis
- Prophase 2 of meiosis
- Anaphase 2 of meiosis
- Interphase
-
A diploid cell with 8 chromosomes undergoes meiosis. How many chromosomes does each daughter cell contain?
- 8
- 2
- 4
- 16
-
A human cell with 46 chromosomes enters mitosis. How many chromatids are present at metaphase?
- 46
- 184
- 92
- 23
-
What separates during anaphase of mitosis to ensure identical daughter cells?
- Non-sister chromatids
- Sister chromatids
- Homologous chromosomes
- Bivalents
-
Why is mitosis significant in asexual reproduction in fungi?
- Halves chromosome number
- Increases genetic diversity
- Recombines parental alleles
- Produces identical offspring
-
Why do most cells in a growing tissue sample appear in interphase?
- Longest cycle phase
- Only non-dividing phase
- Final division phase
- Fastest cycle phase
-
What separates during anaphase I of meiosis to halve chromosome number?
- Centrioles
- Sister chromatids
- Recombinant chromatids
- Homologous chromosomes
-
Which process in meiosis generates new combinations of alleles on single chromosomes?
- DNA replication
- Independent assortment
- Crossing over
- Cytokinesis
-
What is the main risk if the spindle assembly checkpoint is bypassed?
- Stopped protein synthesis
- Accelerated cell growth
- Prevented DNA replication
- Incorrect chromosome numbers
-
A cell with diploid number 4 undergoes meiosis. How many different arrangements of chromosome pairs are possible at metaphase 1?
- 2
- 4
- 8
- 16
-
Which process combines with meiosis to further increase genetic diversity in sexual reproduction?
- DNA proofreading
- Binary fission
- Semi-conservative replication
- Random fertilisation
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