What role do insulator sequences play in the regulation of eukaryotic transcription? See Section 13.1 (Page 479) . What role do insulator sequences play in the regulation of eukaryotic transcription? See Section 13.1 (Page 479) . They block binding of transcription factors to cis-acting promoter elements. They block binding of transcription repressors to cis-acting promoter elements. They block binding of transcription factors to enhancers. They block communication between enhancers and nontargeted promoters.

D. They block communication between enhancers and non-targeted promoters

Explanation:

Insulator sequences are the group of DNA sequences that protect the protein-coding regions of the DNA from the surrounding regulatory sequences. Some insulator sequences are present between the enhancers and promoters of a gene. These insulator sequences do now allow these enhancers to regulate the expression of genes by sending inappropriate signals.

However, if the insulator sequences are not present between the enhancers and promoters of certain genes but are located somewhere else, enhancers can upregulate the expression of these genes.

not sure if this is what you'r looking for eubacteria and archaebacteria