A-LevelBiologyThe mitotic cell cycle9700/12 · May/June 2025 · Q211 Mark

The diagram shows the arrangement of chromosomes with attached spindle fibres during a stage of mitosis. [Figure 21.1 (diagram of chromosomes with spindle fibres)] Which row correctly identifies the stage of mitosis and describes what is happening?

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Astage of mitosis: anaphase, description: chromosomes are being pulled towards the centromeres

Bstage of mitosis: metaphase, description: sister chromatids are replicating prior to separation

Cstage of mitosis: metaphase, description: chromosomes are being positioned along the equator of the cell

Dstage of mitosis: anaphase, description: sister chromatids are being pulled towards the poles of the cell

✓ Correct answer

D: stage of mitosis: anaphase, description: sister chromatids are being pulled towards the poles of the cell

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Topic: The mitotic cell cycle, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2025 Paper 1 Variant 2, question 21.

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