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In bacterial transcription the sigma factor associates with RNA polymerase to:

ATerminate transcription at the rho site
BCatalyse elongation of the RNA chain
CRecognise the promoter and initiate
DSplice introns out of the transcript
Answer & Solution
Correct answer: C. Recognise the promoter and initiate
In bacteria a single RNA polymerase transcribes all RNAs. Sigma associates with it to recognise promoters and start transcription rho is the termination factor. The core polymerase alone catalyses elongation.
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