What is the effect of histone acetylation? O the destruction of the histone O the tightening of the interaction of DNA with the histone O the weakening of the interaction of DNA with the histone O the repression of DNA replication O the repression of transcription

What is the effect of histone acetylation? O the destruction of the histone O the tightening of the interaction of DNA with the histone O the weakening of the interaction of DNA with the histone O the repression of DNA replication O the repression of transcription

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Description: What is the effect of histone acetylation?O the destruction of the histoneO the tightening of the interaction of DNA with the histoneO the weakening of the interaction of DNA with the histoneO the repression of DNA replicationO the repression of tra

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter16: Regulation Of Gene Expression

Section: Chapter Questions

Problem 6TYK

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Which is the expected outcome following the deacetylation of histones? a) Coiling of chromatin, preventing it from being accessed by transcriptional machinery b) Coiling of chromatin, allowing it to be accessed by transcriptional machinery c) Uncoiling of chromatin, preventing it from being accessed by transcriptional machinery d) Uncoiling of chromatin, allowing it to be accessed by transcriptional machinery
The activity of ________ will result in an increasedpositive charge on the histone. Question 24 options: Histone acetyltransferase Histone deacetylase Histone methyltransferase Maintenance methylase Histone demethylase
Enzymes that acetylate the ε-amino group of lysine in the histone tails are called ____ and are involved in initial events in transcriptional activation. histone methyltransferases histone acetyltransferases histone methylases histone deacetylases
Which of these is NOT true of nucleosomes? A. Some post-translational modifications to histone proteins serve as binding sites for transcription factors. B. The position of nucleosomes is fixed on the genome and can not be changed. C. The position and post-translational modifications of histones can be inherited through mitosis. D. The binding between DNA and histone proteins can be disrupted by post-translational modifications.
What epigenetic modification(s) would you expect to see near a gene promoter where transcription is occurring? Histone acetylation 2.)Histone methylation 3.)DNA methylation 4.) a&c 5.) b&c
According to the histone code hypothesis, the pattern of histone modifications acts like a language that a. influences chromatin structure. b. promotes transcriptional termination. c. inhibits the elongation of RNA polymerase. d. does all of the above.
According to the histone-code hypothesis, what is one way that cell specialization occurs? a) Differential DNA methylation patterns b) Variation in enhancers in different cells c) TFII transcription factors binding to different histones in a cell-specific manner d) Differential expression of histone modifying enzymes e) Different histones are expressed in different cells
Which of the following is a method through which cells can control their gene expression? Increase a gene's stability using post-translational modifications Epigenetic modifications of the DNA or histones to regulate DNA avilability phosphorylation of thymidines formation of crosslinks between the DNA strands and the histones
5. How the modification and histone interaction with DNA brought to transcriptional silencing. Use Saccharomyces cerevisiae as example to explain the question. Write a short essay. Please answer asap and in short and content should not be palgarised please
Fill in the blanks Enzymes that catalyze RNA-directed DNA synthesis are called ______. A(n)__________ is an enzyme that cleaves DNA at specfic sequences. The large multisubunit complex that links the general transcription factors to the gene-specific transcription factors is called __________.
_____ is the combination of a seat, elation, another modifications to the histones that allow for changes in DNA winding and unwinding a. Epigentics b. Histone code c. Heterochromatin d. Post translational modifications
Fill in the blank The ______ acts to position RNA polymerase II for transcription initiation. The enzyme _________ is important or releasing torsional stress during DNA replication ____________ of histone tails will neutralize their DNA binding resulting in decondensation of the chromatin.