CAIE A Level Biology 9700 · The mitotic cell cycle
A patient has a rapidly growing tumour in their lung. Cells from the tumour show high mitotic activity. With reference to the structure of chromosomes, the stages of the mitotic cell cycle, and the role of telomeres, outline how a loss of control over cell division can result in the formation of a tumour.
7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.
Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.
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