The three types of RNA present in the Prokaryotic Cells are mRNA, tRNA, and rRNA. These are all synthesised from one type of RNA polymerase enzyme. However, in Eukaryotic Cells there are three types of RNA polymerase enzymes namely RNA polymerase I, RNA polymerase II, and RNA polymerase III. These three types of polymerase enzymes give rise to three types of RNA also present in Eukaryotic Cells. Along with the mRNA, tRNA, and rRNA there is also another type of RNA present in Eukaryotic Cells known as 5S rRNA.