What are two roles that DNA polymerase has in DNA replication?

Role of DNA polymerase in DNA replication. Before replication can take place, an enzyme called helicase unwinds the DNA molecule from its tightly woven form. The double stranded DNA is opened up or "unzipped" to give two single strands of DNA that can be used as templates for replication.

The two roles that DNA polymerase has in DNA replication are: it breaks down long chains of polymers into amino acids and it is an enzyme, as most biochemical reactions do about enzymes, that is responsible for duplicating copies of DNA in the form of nucleic acid molecules.