Question

Eukaryotes have three different types of RNA pol. What are these three types, where are they active. What type of RNA do they make?

Answer 1

RNA pol are abbreviation for RNA polymerase. They are also abrravated as RNAP.

Eukaryotic cells has 3 different types of RNA pol. They are -

• RNA polymerase I
• RNA polymerase II
• RNA polymerase III

The RNA pol are active at their location. RNA polymerase I is located in Nucleolus and RNA ploymerase II AND III is present in nucleus. These are active within their located site. Similarly, three main RNA's are active respectively - mRNA in nucleus ; tRNA in cytoplasm nd rRNA in ribosome.

Different RNA polymerase are responsible for transcipting different types of RNA. They transcripts as follows -

• RNA polymerase I transcribes Pre-rRNA (for 18, 5 , 8 and  28S rRNAs) genes.
• RNA polymerase II transcribes Pre-mRNA, miRNA, snRNA, and snoRNA genes, and
• RNA polymerase III transcribes Pre- tRNA and 5S rRNA genes.