CAIE A Level Biology 9700 · The mitotic cell cycle

The mitotic cell cycle: explain question

Explain5 marksStandard

A researcher studying cell division in the epidermis of a newt observes that after an injury, many cells undergo mitosis to repair the wound. Explain why the daughter cells produced by mitosis are genetically identical to each other and to the original parent cell.

How this question is marked

5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.

Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.

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