MasteringBiology: Regulation Of Eukaryotic Transcription - QuizletHub (2023)

question

Which statements about the modification of chromatin structure in eukaryotes are true?a. Acetylation of histone tails is a reversible process.b. DNA is not transcribed when chromatin is packaged tightly in a condensed form.c. Deacetylation of histone tails in chromatin loosens the association between nucleosomes and DNA.d. Methylation of histone tails in chromatin can promote condensation of the chromatin.e. Acetylation of histone tails in chromatin allows access to DNA for transcription.f. Some forms of chromatin modification can be passed on to future generations of cells.

answer

a. Acetylation of histone tails is a reversible process.b. DNA is not transcribed when chromatin is packaged tightly in a condensed form.d. Methylation of histone tails in chromatin can promote condensation of the chromatin.e. Acetylation of histone tails in chromatin allows access to DNA for transcription.f. Some forms of chromatin modification can be passed on to future generations of cells.

question

Which of the following terms describes the DNA-protein complexes that look like beads on a string?a. Chromatinb. Histonesc. Nucleosomed. 30-nanometer fiber

answer

c. Nucleosome

question

Which of the following regulatory elements is not composed of DNA sequences?a. Enhancersb. Silencersc. Promoter-proximal elementsd. Activators

answer

d. Activators

question

True or false? Regulatory and basal transcription factors regulate transcription by binding to the promoter.a. Trueb. False

answer

b. False

question

Which of the following regulatory DNA sequences might be located thousands of nucleotides away from the transcription start site of a gene?a. Promoterb. TATA boxc. Enhancerd. Promoter-proximal element

answer

c. Enhancer

question

Which of the following events in transcription initiation likely occurs last?a. Basal transcription factors form a basal transcription complex.b. TBP is recruited to the promoter.c. RNA polymerase binds to the promoter of the gene.d. Regulatory transcription factors bind to enhancers.

answer

c. RNA polymerase binds to the promoter of the gene.

question

True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone proteins more positively charged.a. Trueb. False

answer

b. False

question

Which of the following best describes the mechanism by which steroid hormones control gene expression?a. Steroid hormones transport mRNA from the nucleus into the cytoplasm, where it is translated into protein.b. Chaperone proteins transport steroid hormones into the cell and guide them to their target genes.c. Steroid hormones enter a cell, bind directly to hormone response elements (HREs), and enhance transcription.d. Steroid hormones that enter the cell activate receptors. These hormone-receptor complexes then bind HREs and influence gene expression.

answer

d. Steroid hormones that enter the cell activate receptors. These hormone-receptor complexes then bind HREs and influence gene expression.

question

Which of the following best describes the role of chaperone proteins in the regulation of gene expression by steroid hormones?a. Chaperone proteins maintain functionality of the receptor.b. Chaperone proteins activate receptor proteins.c. Chaperone proteins directly enhance transcription.d. Chaperone proteins enter the cell and bind receptor molecules.

answer

a. Chaperone proteins maintain functionality of the receptor.

question

The reason some cells respond to the presence of a steroid hormone while others do not is that _______.a. the receptors necessary for regulation differ among cells of various typesb. the specific HRE is present only in certain cellsc. chaperone proteins block the hormone response elements (HREs) in some cellsd. only certain cells contain the gene that is targeted by a given steroid hormone

answer

a. the receptors necessary for regulation differ among cells of various types

question

The most common type of regulation of gene expression occurs at the level of transcription. Select other types of regulation for gene expression in eukaryotic cells.a. RNA transportb. protein stability (half-life)c. protein transportd. RNA stabilitye. post-translational modifications of proteinsf. transcript stabilityg. initiation of translationh. splicing

answer

a. RNA transportb. protein stability (half-life)d. RNA stabilitye. post-translational modifications of proteinsf. transcript stabilityg. initiation of translationh. splicing

question

Are there any types of regulation unique to eukaryotic cells versus prokaryotic cells?a. Yes, initiation of translation and splicing.b. Yes, initiation of translation and control of transport of RNA or proteins to specific organelles.c. Yes, splicing and control of transport of RNA or proteins to specific organelles.d. No.

answer

c. Yes, splicing and control of transport of RNA or proteins to specific organelles.

question

Which of the following protein domains would be most likely to recognize and bind to acetylated lysine residues on nucleosomes?a. bromodomainsb. chromodomainsc. zinc fingersd. homeodomains

answer

a. bromodomains

question

Which of the following mechanisms illustrates a form of transcriptional repression that is unique to eukaryotes?a. repressors binding to a site near an activator binding site where they interact with and inhibit the activatorb. repressors blocking RNA polymerase by binding an operator site within the promoterc. repressors recruiting enzymes to modify groups on histones to compact chromatind. repressors recruiting enzymes to modify groups on histones to loosen chromatin

answer

c. repressors recruiting enzymes to modify groups on histones to compact chromatin

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question

Which statements about the modification of chromatin structure in eukaryotes are true?a. Acetylation of histone tails is a reversible process.b. DNA is not transcribed when chromatin is packaged tightly in a condensed form.c. Deacetylation of histone tails in chromatin loosens the association between nucleosomes and DNA.d. Methylation of histone tails in chromatin can promote condensation of the chromatin.e. Acetylation of histone tails in chromatin allows access to DNA for transcription.f. Some forms of chromatin modification can be passed on to future generations of cells.

answer

a. Acetylation of histone tails is a reversible process.b. DNA is not transcribed when chromatin is packaged tightly in a condensed form.d. Methylation of histone tails in chromatin can promote condensation of the chromatin.e. Acetylation of histone tails in chromatin allows access to DNA for transcription.f. Some forms of chromatin modification can be passed on to future generations of cells.

question

Which of the following terms describes the DNA-protein complexes that look like beads on a string?a. Chromatinb. Histonesc. Nucleosomed. 30-nanometer fiber

answer

c. Nucleosome

question

Which of the following regulatory elements is not composed of DNA sequences?a. Enhancersb. Silencersc. Promoter-proximal elementsd. Activators

answer

d. Activators

question

True or false? Regulatory and basal transcription factors regulate transcription by binding to the promoter.a. Trueb. False

answer

b. False

question

Which of the following regulatory DNA sequences might be located thousands of nucleotides away from the transcription start site of a gene?a. Promoterb. TATA boxc. Enhancerd. Promoter-proximal element

answer

c. Enhancer

question

Which of the following events in transcription initiation likely occurs last?a. Basal transcription factors form a basal transcription complex.b. TBP is recruited to the promoter.c. RNA polymerase binds to the promoter of the gene.d. Regulatory transcription factors bind to enhancers.

answer

c. RNA polymerase binds to the promoter of the gene.

question

True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone proteins more positively charged.a. Trueb. False

answer

b. False

question

Which of the following best describes the mechanism by which steroid hormones control gene expression?a. Steroid hormones transport mRNA from the nucleus into the cytoplasm, where it is translated into protein.b. Chaperone proteins transport steroid hormones into the cell and guide them to their target genes.c. Steroid hormones enter a cell, bind directly to hormone response elements (HREs), and enhance transcription.d. Steroid hormones that enter the cell activate receptors. These hormone-receptor complexes then bind HREs and influence gene expression.

answer

d. Steroid hormones that enter the cell activate receptors. These hormone-receptor complexes then bind HREs and influence gene expression.

question

Which of the following best describes the role of chaperone proteins in the regulation of gene expression by steroid hormones?a. Chaperone proteins maintain functionality of the receptor.b. Chaperone proteins activate receptor proteins.c. Chaperone proteins directly enhance transcription.d. Chaperone proteins enter the cell and bind receptor molecules.

answer

a. Chaperone proteins maintain functionality of the receptor.

question

The reason some cells respond to the presence of a steroid hormone while others do not is that _______.a. the receptors necessary for regulation differ among cells of various typesb. the specific HRE is present only in certain cellsc. chaperone proteins block the hormone response elements (HREs) in some cellsd. only certain cells contain the gene that is targeted by a given steroid hormone

answer

a. the receptors necessary for regulation differ among cells of various types

question

The most common type of regulation of gene expression occurs at the level of transcription. Select other types of regulation for gene expression in eukaryotic cells.a. RNA transportb. protein stability (half-life)c. protein transportd. RNA stabilitye. post-translational modifications of proteinsf. transcript stabilityg. initiation of translationh. splicing

answer

a. RNA transportb. protein stability (half-life)d. RNA stabilitye. post-translational modifications of proteinsf. transcript stabilityg. initiation of translationh. splicing

question

Are there any types of regulation unique to eukaryotic cells versus prokaryotic cells?a. Yes, initiation of translation and splicing.b. Yes, initiation of translation and control of transport of RNA or proteins to specific organelles.c. Yes, splicing and control of transport of RNA or proteins to specific organelles.d. No.

answer

c. Yes, splicing and control of transport of RNA or proteins to specific organelles.

question

Which of the following protein domains would be most likely to recognize and bind to acetylated lysine residues on nucleosomes?a. bromodomainsb. chromodomainsc. zinc fingersd. homeodomains

answer

a. bromodomains

question

Which of the following mechanisms illustrates a form of transcriptional repression that is unique to eukaryotes?a. repressors binding to a site near an activator binding site where they interact with and inhibit the activatorb. repressors blocking RNA polymerase by binding an operator site within the promoterc. repressors recruiting enzymes to modify groups on histones to compact chromatind. repressors recruiting enzymes to modify groups on histones to loosen chromatin

answer

c. repressors recruiting enzymes to modify groups on histones to compact chromatin

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