Question

multiple choice question
how are eukaryotic transcription factors involved in transcription initiation?
o they synthesize the first 5 - 7 nucleotides of the mrna.
o they recruit rna polymerase to the promoter.
o they unwind the dna helix at the promoter site.
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Explanation:

Eukaryotic transcription factors play a crucial role in transcription initiation. They do not synthesize mRNA nucleotides (that's RNA polymerase's role in elongation). Unwinding DNA at the promoter is mainly by helicase - like activities in some cases but not the main role of general transcription factors. Their key function is to recruit RNA polymerase to the promoter region, which is essential for the start of transcription.

Answer:

They recruit RNA polymerase to the promoter.