CAIE A Level Biology 9700 · The mitotic cell cycle
Explain how a hepatic stem cell undergoes mitosis to produce new hepatocytes for tissue repair, and why uncontrolled division of such stem cells could lead to tumour formation. In your answer, refer to the stages of the cell cycle, the structure of chromosomes, and the role of telomeres.
6 marks, so the mark scheme is looking for about 6 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.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.