B2 Cell division
Summary questions
1 a What is the cell cycle?
[1 mark]
b Explain how and why you would expect the length
of the cell cycle to vary:
i between an early embryo in the first days after
fertilisation and a 5-year-old child
[4 marks]
ii between a 13-year-old student and a 70-year-old
adult.
[5 marks]
5
