Answer: It helps transcribe the DNA strand.
Control of the process of gene transcription affects patterns of gene expression and thereby allows a cell to adapt to a changing environment perform specialized roles within an organism and maintain basic metabolic processes necessary for survival. Therefore it is hardly surprising that the activity of RNAP is long complex and highly regulated. In Escherichia coli bacteria more than 100 transcription factors have been identified which modify the activity of RNAP.
RNA polymerase 1 (also known as Pol I) is in higher eukaryotes the polymerase that only transcribes ribosomal RNA (but not 5S rRNA which is synthesized by RNA polymerase III) a type of RNA that accounts for over 50% of the total RNA synthesized in a cell.
RNA polymerase – Wikipedia
RNA polymerase – Wikipedia
In eukaryote cells RNA polymerase III (also called Pol III) transcribes DNA to synthesize ribosomal 5S rRNA tRNA and other small RNAs. The genes transcribed by RNA Pol III fall in the category of “housekeeping” genes whose expression …