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The main enzymes involved in DNA replication are: Helicase: unwinds the double helix into two strands Polymerase: adds nucleotides to an existing strand Ligase: brings togeth â¦ er the Okazaki fragments Topoisomerase: cuts and rejoins the helix RNA primase: catalyzes the synthesis of RNA primers Hope this helps!
Replication Fork. During DNA replication a DNA double helix must unwind and separate so that DNA polymerase enzymes can use each single strand as a template for the synthesis of a new double strand. Strand separation is catalyzed by a Helicase enzyme.n both the leading and lagging strands, DNA replication starts with primase adding a short (3 to 10 base) RNA primer to the template strand. Once the primer is added, DNA polymerase III elongates the strand by added DNA nucleotides to the 3â-hydroxy end of the growing polymer.