Some transcription signals are located thousands of base pairs upstream of the gene they regulate. how does the distant signal initiate transcription? (2 points) activation of the transcription signal releases a secondary messenger that binds to the start codon and initiates transcription. long regions of dna can loop over to enable regulatory connections. the distance between the transcription signal and the gene allows for preprogrammed delays in the start of transcription. the region between the transcription signal and the gene is an exon that is spliced out following activation of the transcription signal.

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.