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CAIE A Level Biology 9700 · The mitotic cell cycle

The mitotic cell cycle: describe question

Describe5 marksChallenge

Describe the structure of a chromosome as it appears during prophase of mitosis. In your answer, you should include:

  • the composition of chromatin (DNA and histone proteins)
  • the arrangement of sister chromatids and the centromere
  • the location and function of telomeres. Also describe the main stages of the mitotic cell cycle (interphase, mitosis, and cytokinesis) and explain how this cycle produces two genetically identical daughter cells. Finally, describe the role of stem cells in cell replacement and tissue repair, and state how uncontrolled cell division can lead to tumour formation.
0 words · 5 marks

No account needed for your first marks. Your answer is used only to mark it.

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.

Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.

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