Final answer:
Telomeres are repetitive DNA sequences that protect chromosomes during cell division.
Explanation:
Telomeres are the repetitive DNA sequences present at the ends of eukaryotic chromosomes. They consist of noncoding sequences like the six base pair sequence TTAGGG, which is repeated multiple times to protect genes during cell division. The discovery of the enzyme telomerase has been crucial in understanding how chromosome ends are maintained.
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