RNA polymerase

RNA polymerase (2.7.7.6) is a group of nucleotidyl transferase enzymes that promote the synthesis of RNA using DNA or RNA as a template.It transcribes genetic information stored in “thread of life” DNA into a message that can be read by the ribosome to produce protein by process known as translation. So this enzyme polymerizes ribonucleotides in accordance with the information present in DNA and this process is known as transcription. The RNA polymerase scans the appropriate section of the DNA thread and produces an exact copy of the genetic text. Prokaryotes have a single enzyme for the RNA synthesis while Eukaryotes have three different type of RNA polymerase. Type I synthesises all rRNA except the 5S component, type II synthesises mRNA and hnRNA and type III synthesises tRNA and the 5S component of rRNA.