Sunday, March 4, 2012

What is the role of enzymes in the DNA replication process?

a. Enzymes read the DNA code and build a new DNA molecule from scratch.



b.Enzymes link together to form a template for a new DNA molecule to be built.



c.Enzymes split the DNA molecule into two rails and then transport

corresponding nitrogen bases to each rail.



d.Enzymes link adjacent nucleosides together, becoming an integral part of the structure of the new strands of DNA.What is the role of enzymes in the DNA replication process?
Helicase: Unwounds a portion of the DNA Double Helix



RNA Primase: Attaches RNA primers to the replicating strands.



DNA Polymerase delta (盲): Binds to the 5' - 3' strand in order to bring nucleotides and create the daughter leading strand.



DNA Polymerase epsilon (氓): Binds to the 3' - 5' strand in order to create discontinuous segments starting from different RNA primers.



Exonuclease (DNA Polymerase I): Finds and removes the RNA Primers



DNA Ligase: Adds phosphate in the remaining gaps of the phosphate - sugar backbone



Nucleases: Remove wrong nucleotides from the daughter strand.

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