Transcription
Which of the following statement defines a replicon?

A DNA molecule that is able to replicate and be maintained
The enzyme responsible for transposition
A DNA template which is used in transcription
A DNA molecule that encodes pili for conjugation

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

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

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