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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 siteI got this question during an interview for a job.This key question is from Transcription in Prokaryotes : Initiation topic in division Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer»

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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