A telomere is a region that constantly repeats nucleotide sequences at each end of a chromosome.
This protects the end of the chromosome from deterioration or from fusion with neighboring chromosomes.
The sequence of nucleotides in telomeres is TTAGGG, with its complementary DNA strand translating to AATCCC
Cancer is a disease in which destructive and abnormal cells uncontrollably multiply.
This can cause serious tissue damage. The tissue can sometimes even be destroyed.
Cancer normally begins as a tumor, but rapidly grows and turns into cancer.
Infections and exposure to ionizing radiation can also lead to cancer.