A-LevelBiologyThe mitotic cell cycle9700/12 · May/June 2012 · Q171 Mark

Each of the following events takes place during mitosis. 1 centromeres divide 2 chromatids move to opposite poles of the cell 3 chromosomes line up along the equator of the spindle 4 chromosomes uncoil 5 two chromatids are joined by a centromere In which order do the events take place?

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Afirst: 1, last: 3 (order: 1, 2, 4, 5, 3)

Bfirst: 3, last: 5 (order: 3, 1, 2, 4, 5)

Cfirst: 4, last: 2 (order: 4, 5, 3, 1, 2)

Dfirst: 5, last: 4 (order: 5, 3, 1, 2, 4)

✓ Correct answer

D: first: 5, last: 4 (order: 5, 3, 1, 2, 4)

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Topic: The mitotic cell cycle, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2012 Paper 1 Variant 2, question 17.

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