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Compare RNA-dependent RNA polymerase. RNA polymerase (RNAP or RNApol), also known as DNA-dependent RNA polymerase, is an enzyme that produces primary transcript RNA. In cells, RNAP is necessary for constructing RNA chains using DNA genes as templates, a process called transcription.
Merge this question into. Split and merge into it. Answer by Ligand. Confidence votes 7.6K. If the RNA is messenger RNA (mRNA), the process is called transcription. There are other types of RNA that are synthesized using DNA as a template, such as transfer RNA (tRNA) and ribosomal RNA (rRNA). Unlike mRNA, these are gene products, and the term transcription is not used when they are made.