The Enzyme That Some Organisms Use to Replicate DNA at the 5

Question

The enzyme that some organisms use to replicate DNA at the 5' ends of chromosomes is called
A) DNA polymerase.
B) telomerase.
C) DNA ligase.
D) replicase.
E) lactamase

Accepted Answer

Telomerase is the enzyme responsible for adding short repeated sequences called telomeres to the 5' ends of chromosomes during DNA replication in some organisms. This helps to prevent the loss of genetic material during cell division. DNA polymerase is the enzyme responsible for adding nucleotides to the growing DNA strand during replication. DNA ligase is the enzyme responsible for ligating, or joining together, the gaps in the sugar-phosphate backbone of newly synthesized DNA fragments during DNA replication. Replicase is a general term used for the enzymes involved in DNA replication. Lactamase is an enzyme that breaks down lactams, a type of cyclic amide compound.