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Processivity of RNA polymerase is ________(a) Very high(b) High(c) Low(d) Very lowI had been asked this question in an online interview.This key question is from Transcription in Prokaryotes : Elongation in section Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer»

The correct answer is (a) Very high

For explanation I would SAY: RNA POLYMERASE is highly processive as when the sigma subunit dissociates the DNA binding arm of RNA polymerase clamps shut around the DNA prevents it from falling off. DNA polymerase I on the other hand has low PROCESSIVITY.



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