Telomeres prevent the loss of genes from the ends of chromosomes during DNA replication, but they become shorter each time they are copied.
In cancer cells and stem cells, the telomeres remain the same length.
Which statement is correct for all human cells?
If telomeres become too short, a cell may stop dividing.
2 )
Adding telomeres could increase the rate of ageing of cells.
3 )
Telomeres are repaired by the enzyme RNA polymerase.
4 )
Telomeres prevent all damage occurring to DNA molecules.
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