RNA Polymerase is a part of DNA Transcription. It is an enzyme that adds and links complementary RNA nucleotides during transcription which is required. RNA Polymerase binds to the gene's promoter which is a sequence of DNA that acts as a start signal for transcription. RNA then unwinds and seperates the two strands of the double helix. The last step adds and then links complementary RNA nucleotides.
The DNA Transcription is also the process of making RNA. RNA Polymerase binds to the genes promotor. RNA is an enzyme that adds and links RNA nucelotides during transcription.