Final answer:
Telomere synthesis is repeated until the ends of the chromosomes are replicated by telomerase enzyme, adding complementary bases to the RNA template.
Step-by-step explanation:
Telomere synthesis is repeated until the ends of the chromosomes are replicated. Telomeres, which are repetitive sequences at the ends of linear chromosomes, protect the genes from being deleted as cells divide. The telomerase enzyme attaches to the end of the chromosome and adds complementary bases to the RNA template, which then elongates the 3' end of the DNA strand. This allows DNA polymerase to add nucleotides that are complementary to the ends of the chromosomes, resulting in the replication of the chromosome end