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Answer Wiki. Eukaryotic RNA polymerases are of three types -RNA polymerase 1,RNA polymerase 2 and RNA polymerase 3.RNA polymerase is an enzyme that catalyses the synthesis of RNA from DNA.What is the function of the DNA helicase?
There are different types of DNA helicase, their primary function is to eliminate the torsion produced by the supercoiling of the DNA that could potentially stop replication.What are the three roles of RNA polymerase in transcription?
The role of RNa polymerase in transcription is : it binds to the promoter region of a gene and adds new nucleotides to the growing end of nascent mRNA. It must keep adding nucleotids in order to fully develop the mRNA to allow for trancription of the cell.