If you consider a transcribing RNA pol II with a transcript as small as 30 bases, which serine residue in its CTD will be phosphorylated?
(a) 2
(b) 5
(c) 7
(d) None
This question was addressed to me in class test.
I need to ask this question from Transcription in Eukaryotes : RNA Polymerases topic in chapter Gene Expression : Transcription Prokaryotes of Cytogenetics