DNA Replication Steps Final Exam.
DNA Replication Steps Final Exam. Step 1: Starts at? - CORRECT ANSWER DNA Replication begins at the Origin of Replication Step 2: Unwinds - CORRECT ANSWER Helicase cuts hydrogen bonds and separates DNA in half Step 3: Holds strands - CORRECT ANSWER Single Strand Binding Proteins attach to the halves and keep the DNA molecules separated Step 4: Two types of strands added 3' to 5' - CORRECT ANSWER The Replication Fork is forms with the Leading and Lagging strands. Step 5: RNA Primer - CORRECT ANSWER In the leading strand, RNA Primase moves along nucleotides and coats with a RNA Primer that will be used as a tag for the DNA Polymerase. Step 6: Add bases - CORRECT ANSWER DNA polymerase III attaches after primase to DNA nucleotides and move along towards the Replication Fork in 5' -- 3' direction. It adds nucleotides to the half DNA molecules. Step 7: Fix mistakes, remove RNA Primer - CORRECT ANSWER Another type of DNA Polymerase I replaces the primer with DNA nucleotides so all DNA is there. Step 9: join fragments together - CORRECT ANSWER Ligase stitches up the gaps.
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