A-LevelBiologyThe mitotic cell cycle9700/12 · Oct/Nov 2018 · Q211 Mark

Which changes in a group of mammalian cells, dividing by mitosis, would be necessary for the formation of a tumour? 1 Mitosis is no longer inhibited by cell to cell contact. 2 Cells acquire the ability to migrate and set up new colonies. 3 Cells become able to divide indefinitely.

A1 and 2

B1 and 3

C1 only

D2 and 3

✓ Correct answer

B: 1 and 3

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Topic: The mitotic cell cycle, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, Oct/Nov 2018 Paper 1 Variant 2, question 21.

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