In bacteria, there is a single DNA-dependent RNA polymerase which catalyses the formation of mRNA, tRNA and rRNA. In eukaryotes, there are three types of RNA polymerases, which show division of labour. In the nucleus, there are three types of RNA polymerases (i) RNA polymerase I transcribes rRNAs, (28S, 18S and 5.8S) (ii) RNA polymerase II transcribes the precursor of mRNA called hnRNA. (iii)RNA polymerase III transcribes tRNA, 5 SrRNA and SnRNAs.
Describe the role of RNA polymerases in transcription in bacteria and in eukaryotes.
Answers
Talvindar
In bacteria, there is a single DNA-dependent RNA polymerase which catalyses the formation of mRNA, tRNA and rRNA.
In eukaryotes, there are three types of RNA polymerases, which show division of labour.
In the nucleus, there are three types of RNA polymerases
(i) RNA polymerase I transcribes rRNAs, (28S, 18S and 5.8S)
(ii) RNA polymerase II transcribes the precursor of mRNA called hnRNA.
(iii)RNA polymerase III transcribes tRNA, 5 SrRNA and SnRNAs.