Please describe the regulatory role of enhancers that binds to responsible regulators to activatethe target gene at a given time and place through comparing different organisms according to thepresence of regulatory sequences.regulatory promotersequencebacteriaFIGURE 19-1 The regulatory ele-ments of bacterial, yeast, and humangenes. Illustrated is the increasing complex-ity of regulatory sequences from a simplebacterial gene controlled by a repressor toa human gene controlled by multiple activa-tors and repressors. In each case, a promoteris shown at the site where transcription isinitiated. Although this is accurate for thebacterial case, in the eukaryotic examples,transcription initiates somewhat down-stream from where the transcription ma-chine binds (see Chapter 13). Some groupsof regulatory binding sites in the human reg-ulatory sequences represent enhancers, asshown in one case.yeasthumanenhancer

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Enhancer arrangements are administrative DNA successions that, when limited by explicit proteins…

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Please describe the regulatory role of enhancers that binds to responsible regulators to activate the target gene at a given time and place through comparing different organisms according to the presence of regulatory sequences.

Please describe the regulatory role of enhancers that binds to responsible regulators to activate the target gene at a given time and place through comparing different organisms according to the presence of regulatory sequences.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter16: Gene Expression

Section: Chapter Questions

Problem 9RQ: The a/a operon is an inducible operon that controls the production of the sugar arabinose. When...

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ne of the main lessons of this chapter is that several bacterial genes are often transcribed from a single promoter into a large multigene (polycistronic) transcript. The region of DNA containing the set of genes that are cotranscribed, along with all of the regulatory elements that control the expression of these genes, is called an operon. a. Which of the mechanisms in the following list (i-vi) could explain differences in the levels of the protein products of different genes in the same operon? Different promoters might have different DNA sequences Different promoters might be recognized by different types of RNA polymerase The secondary structures of mRNAs might differ which will influence the rate at which they are degraded by ribonucleases. In an operon, some genes are farther away from the promoter than other genes The translational initiation sequences at the beginning of different open reading frames in an operon might result in different efficiencies of translation Proteins…
The following statement occurs early in this chapter:“. . . a crucial step in the regulation of many bacterialgenes is the binding of RNA polymerase to DNA atthe promoter.” Why might it be advantageous forbacteria to regulate the expression of their genesat this particular step?
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iestiðn Pre-initiation complex (PIC) is formed right before the initiation of genes, which of the following steps seemes to NOT help for the PIC formation? O TBP protein to recognize TATA box at promoter region O TFIIA to recognize the TAFS in TFIID O Enhancers to attract coactivators and activators O Silencers to attract repressor and corepressors