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The catalytic unit of RNA polymerases when placed properly during initiation is just over _________

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The catalytic unit of RNA polymerases when placed properly during initiation is just over _________

(a) -1 site

(b) 0 site

(c) +1 site

(d) – 10 site

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This key question is from Transcription in Prokaryotes : Initiation topic in division Gene Expression : Transcription Prokaryotes of Cytogenetics

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Right option is (c) +1 site

Explanation: The catalytic subunit is exactly over the first nucleotide of mRNA which is at +1 site. -1 signifies one site upstream to initiation while there is no 0 site. -10 box is recognized by sigma factor.

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