Telomeres stop genes at the ends of chromosomes from being lost during DNA replication, but they get shorter each time they are copied. In cancer cells and stem cells, the telomeres stay the same length. Which statement is true for every human cell?
- AIf telomeres become too short, a cell may stop dividing.
- BAdding telomeres could increase the rate of ageing of cells.
- CTelomeres are repaired by the enzyme RNA polymerase.
- DTelomeres prevent all damage occurring to DNA molecules.