Question

Telomere replication is possible due to:

1. A DNA overhang on the 5’ and 3’ ends that acts as a template for the DNA polymerase
2. Their circular nature allows roundabout synthesis by the replication fork
3. An RNA template within telomerase which allows synthesis past the 5’ and 3’ overhangs.
4. Telomeres are not replicated
5. A ribozyme polymerizes the nascent DNA strands.

Answer 1

The right ans is c An RNA template within telomerase which allows synthesis past the 5’ and 3’ overhangs.

The ends of linear chromosomes is called the telomeres that protects the genes from getting deleted as cells continue to divide the telomerase enzyme attached to the end of the chromosome which is complementary to the bases to the RNA template are added on the 3' end of the DNA strand. So Once the lagging strand is elongated by telomerase the DNA polymerase can add the complementary nucleotides to the end of the chromosome and telomere can be finally replicated.