And that makes sense because during replication we have to replicate our DNA precisely to pass it down to our offspring. Now the other thing that I want to mention about RNA polymerase is the following. In prokaryotic organisms there's only one RNA polymerase while in eukaryotic organisms there are three different types of RNA polymerases and each one of these RNA polymerases is used to synthesize the three different types of RNA molecules our messenger RNA, the transfer RNA and the ribosomal RNA. Now what about the process of termination? So just like there is a sequence of nucleotides that initiates the process of transcription there is also a sequence of nucleotides of DNA nucleotides found on the double stranded DNA that also signal the process of termination. So the process by which our transcription basically stops and the sequence of DNA of DNA nucleotides is known as the termination sequence.