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Types of RNA polymerase required in nucl...

Types of RNA polymerase required in nucleus for RNA synthesis

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Three RNA polymerases exist in cells. They are :
(1) RNA polymerase I - It transcribes r RNAs (28S, 18S and 5.8S)
(2) RNA polymerase II - It transcribes the presursor of RNA, the heterogeneous nuclear RNA (hn RNA)
(3) RNA polymerase III - It is responsible for transcription of tRNA 5 Sr RNA and Sn RNAs (small nuclear RNAs)
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