
How do enhancers differ from promoters as cis-acting regulatory sequences in eukaryotes?
How do promoters in Archaea and Eukaryotes differ?
What are “cis-regulatory elements,” “trans-regulatory factors,” “exons,” “introns,” “untranslated regions,” “proximal promoters,” “enhancers,” “repressors,” "activators,” “caps,” and “poly-A tails”? Which are protein coding sequence (or are actual proteins); which are not? Which make it into mature mRNA?
Enhancers are said to be cis-acting. What is meant by
cis-acting, and what are enhancers?
Enhancers are said to be cis-acting. What is meant by cis-acting, and what are enhancers? Essay answers are limited to about 500 words (3800 characters maximum, including spaces). 3800 Character(s) remaining
Compare and contrast the role of promoters versus enhancers in controlling gene expression by answering the following questions. Are they cis- or trans- acting components of the regulatory machinery? Explain why this label applies to each? Where are they located relative to the transcription start site (TSS) of a gene? What kinds of transcription factors (TFs) does each element bind, and what are the particular TFs’ role in gene expression?
Enhancers are Select one: 1- regulatory DNA sequences. 2- regulatory proteins.
Promoters are cis-acting. The promoter is considered a cis-acting site because: A it influences the expression of a family of genes within a protein domain. B it exclusively influences the expression of genes to which the promoter is proximal. C it activates the gene it is proximal to while inhibiting the expression of all others. D it regulates the transcription of both alleles of an allele pair. E promoters bind to the sigma subunit.
1. Gene regulatory elements are a) trans-acting transcription factors b) cis-acting transcription factors c) trans-acting DNA sequences d) cis-acting DNA sequences 2. The unwinding of DNA during the initiation of transcription is mediated by the helicase activity by: a) TFIID b) TFIIH c) TFIIF d) TFIIE
How do enhancers differ from promoter proximal response elements?
Enhancers can regulate genes from a distance, and yet they promoters influence of only some genes changing Insulators are particular enhancers to that control access of potential insulator sequence translatiorn Insulators can be identfied by cloning a promoter and an enhancer and determining the effect on transcription of a between a distant the same at all times at different times static dynamic In humans, insulators bind to with each other to fornm which then interact Enhancers affect transcription from promoters...
1. trans-acting factors are able to regulate target genes from any chromosome, whereas cis-acting elements can only regulate genes located in the same chromosome. a. True only in operons. In Eukaryotic systems, trans-acting factors only regulate genes in the same chromosome. b. True only in Eukaryotes. Prokaryotes don’t have cis-acting elements. c. True for any organism. d. False. The statement is erroneous 2. Unlike activators, repressors never affect chromatin structure. Repressors inhibit transcription only by binding to the binding sites...