Dna Replication Timeline By Icyymon14 Dec 7, 2018 Step 1 Separates dna strands Dec 7, 2018 Step 2 Replicates dna molecule to build a new strand of dna Dec 15, 2018 Step 4 It helps glue dna fragments together. Dec 15, 2018 Step 3 Makes the primase so that DNA polymerase can figure what to go start to work.