Bio Question - Transcription

[zxe1996]

So i'm a bit confused by this BC explanation..

In prokaryotic cells, RNA polymerase can directly detect the promoter region in the DNA. In eukaryotic cells RNA polymerase cannot directly detect the promoter region, and requires the binding of transcription factors in order to initiate transcription.

From what I understand prokaryotes need a sigma factor to bind to the core enzyme to form the holoenzyme in order to recognize and bind to the -35 & -10 promotor region. Am I mixing up prokaryotic and eukaryotic transcription?

If someone could clear this up that would be greatly appreciated!

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[FeralisExtremum]

In eukaryotes/archaea the pre-initiation complex (consisting of multiple transcription factors + the RNA polymerase) must form for transcription to begin. In prokaryotes RNA polymerase can bind the prokaryotic DNA but it does so without high specificity - to target promoter sites, it must first form a holoenzyme (sigma factor + RNA polymerase).