In Many Eukaryotes, There Are Repetitive Sequences Called Telomeres at the Ends

Essay

In many eukaryotes, there are repetitive sequences called telomeres at the ends of chromosomes.After successive rounds of DNA replication, the _______ strand becomes shorter.In some cells, an enzyme called _______ repairs the shortened strand.
a. lagging; telomerase
b. leading; DNA polymerase I
c. leading; replicase
d. lagging; DNA polymerase I
e. leading; telomerase