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Confidence votes 106. The role that enzymes plays in DNA replication is that the enzyme helicase breaks hydrogen bonds between the complementary bases, and the chains separate.
Answer by VictorVenefic. Confidence votes 202. In DNA replication, DNA polymerase III is the enzyme which joins the DNA nucleotides together via phospodiester bonds. DNA Ligase is the enzyme that seals gaps in DNA during DNA Replication.