Final answer:
Telomerase will elongate the 3' end of the DNA strand.
Step-by-step explanation:
The strand that telomerase will elongate is the 3' end of the DNA strand.
Telomeres are repetitive sequences at the ends of linear chromosomes that protect the genes from getting deleted during cell division. The telomerase enzyme contains a built-in RNA template that attaches to the end of the chromosome. Complementary bases to the RNA template are then added on the 3' end of the DNA strand, elongating it. Once the lagging strand template is sufficiently elongated, DNA polymerase adds nucleotides complementary to the ends of the chromosomes, replicating the ends of the chromosomes.