A-LevelBiologyThe mitotic cell cycle9700/12 · May/June 2013 · Q191 Mark

Chromosome telomeres are essential for DNA replication and are not completely replicated during mitosis. A substance X is known that completely replaces telomeres during mitosis. What will be the effect of growing cells with and without substance X?

Acells divide continually cell division eventually slows and stops

Bcells divide more rapidly cells divide continually

Ccell division eventually slows and stops cell division stops immediately

Dcell division stops immediately cells divide continually

✓ Correct answer

A: cells divide continually cell division eventually slows and stops

Oracle Prep sorts past-paper questions by topic, so you can drill The mitotic cell cycle and see which topics are most likely to come up next.

Topic: The mitotic cell cycle, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2013 Paper 1 Variant 2, question 19.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content