Transcription
The components found in all prokaryotic transcription terminators is

a hairpin structure
a poly-U region
Rho factor
none of these

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Transcription
The location of first hexameric sequence typically found in pro-karyotic promoters is

approximately 25 bases upstream of the transcription start site
at the transcription start site
approximately 35 bases upstream of the transcription start site
approximately 10 bases upstream of the transcription start site

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