HUAWEI Nova 2 PlusDUAL CAMERAQuestion71Which of the following will lead to epigenetic gene silencing:O a.A decrease in histone deacetylation.Not yetansweredO b. An increase in transcription activators.Marked out ofO C.a decrease in chromatin remodeling complex expression1.00P FlagO d. A decrease in histone acetylation.questionO e. An increase in histone acetylation.Question72In the steps to produce the indigo dye, the tryptophan is converted into indole happens due to the action ofenzyme.Not yetanswéredAnswer:Marked out of1.00P FlagquestionQuestion73The main reason the glycosylase can detect the damage in the nitrogenous base isO a. Nature of the DNA moleculeNot yetansweredOb. It recognizes the methyl group on DNAO C.It can diffuse laterally along the major groove of the DNAMarked out of1.00O d. Its is cable of hydrolyzing the glycosidic bondP FlagO e.It is cable of ligating the damaged base of DNAquestion

Epigenetic changes occur due to environmental changes in the surrounding atmosphere. Enzymes are…

Which of the following will lead to epigenetic gen O a. A decrease in histone deacetylation. O b. An increase in transcription activators. O c. a decrease in chromatin remodeling com O d. A decrease in histone acetylation. An increase in histone acetylation. In the steps to produce the indigo dye, the trypto enzyme. Answer: The main reason the glycosylase can detect the c O a. Nature of the DNA molecule b. It recognizes the methyl group on DNA O c. It can diffuse laterally along the majorg Od. Its is cable of hydrolyzing the glycosidic e. It is cable of ligating the damaged base c

Which of the following will lead to epigenetic gen O a. A decrease in histone deacetylation. O b. An increase in transcription activators. O c. a decrease in chromatin remodeling com O d. A decrease in histone acetylation. An increase in histone acetylation. In the steps to produce the indigo dye, the trypto enzyme. Answer: The main reason the glycosylase can detect the c O a. Nature of the DNA molecule b. It recognizes the methyl group on DNA O c. It can diffuse laterally along the majorg Od. Its is cable of hydrolyzing the glycosidic e. It is cable of ligating the damaged base c

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Choose the correct statements about epigenetic regulation in eukarya Group of answer choices Acetylation of histones increases transcription Methylation of DNA decreases transcription X-inativation in female mammals is accomplished through massive acetylation of the X chromosome Methyl tags on DNA are permanent and cannot be changed.
Discuss histones and how methylation and acetylation of DNA and histones can affect the production of a protein. Include a picture to show acetylation of histones and how it affects chromosome condensing
The abortive transcription occurs Select one: O a. during transcription elongation O b. when there is a mutation in promoter O c. when transcription is initiated O d. When transcription is terminated.
What is the result of histone tal deacetylation on histone-DNA interaction? Increase in positive charge to histone leads to tighter interactions O Addition of positive charge to histone repels DNA and loosens interaction O No effect, as the histone tail does not interact with DNA O Neutralisation of charge on histone loosens interaction with DNA O Neutralisation of charge on histone leads to tighter interaction with DNA
Eukaryotic transcriptional repressors may act by Choose an answer below competing for a binding site of an activator. blocking the DNA binding domain of an activator. blocking the activation domain of an activator. recruiting a histone deacetylase the action of which leads to chromatin compaction. all of the above
Which one of the following describes an epigenetic modification? A point mutation in the coding sequence of a gene. A deletion in the regulatory region of a genc. A nonsense mutation in the coding region of a gene. O A methyl group bound to DNA inhibits transcription of a gene.
. Gene expression in mammals can be increased by which of the following mechanisms? X-chromosome inactivation (as in the case of the female tortoiseshell cat) histone dephosphorylation histone methylation histone deacetylation E. histone phosphorylation
What are histone proteins, and how are their DNA binding properties regulated. Indicate if there are any modification(s) that comes on and off that regulates how tightly or loosely the Histone proteins are bound to DNA.
MyoD is a transcriptional activator that turns on theexpression of several muscle-specific genes in humancells. The Id gene product inhibits MyoD action.a. One possibility is that the Id protein directly represses the expression of these muscle-specificgenes. Explain how Id would function if it were arepressor.b. Another possibility is that Id inhibits musclespecific gene transcription indirectly, by preventingMyoD function. Explain how Id could function asan indirect repressor.c. Suppose you know the amino acid sequence ofthe Id protein. How might this information supportthe hypothesis in part (a) or in part (b)?
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Define the epigenetic mechanisms - chromatin remodeling bythe addition or removal of chemical groups to histone proteins ?