Homework Answers
Cis acting elements are regions that are non-coding and on which proteins and enzymes bind and regulate DNA transcription, translation.
Answer- Silencers, enhancers, insulators
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Choose the cis-elements. Click on the cis regulatory elements only. Control of eukaryotic gene expression (gene...
Which of the following is not true regarding regulation of gene expression in eukaryotes? In eukaryotic...
Which of the following is not true regarding regulation of gene expression in eukaryotes? In eukaryotic cells, transcriptional activators often work by recruiting the transcriptional macinery to gene promoters DNA methylation is an example of an epigenetic mark that can be inherited Acetylation of histones can result in a more open chromatin structure to allow transcription to occur Different genes can be turned off or on between different organs or stages of development Transcription factor DNA sequences are bound by...
Draw a Eukaryotic Gene Schematic Draw features of importance at the DNA level Transcription start site...
Draw a Eukaryotic Gene Schematic Draw features of importance at the DNA level Transcription start site +1 Promoter - as much detail as you can Gene start ATG and stop codons Transcription Regulatory Sequences such as activators/repressors and enhancers/insulators Draw features of importance at the pre-mRNA level Designate Introns and Exons Designate important Sequences to direct and regulate splicing three important sequences for the chemistry of splicing splicing regulatory sequences (ISS, ISE, ESE, ESS) Modifications at level of pre-mRNA UTRs,...
1. trans-acting factors are able to regulate target genes from any chromosome, whereas cis-acting elements can...
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...
What are “cis-regulatory elements,” “trans-regulatory factors,” “exons,” “introns,” “untranslated regions,” “proximal promoters,” “enhancers,” “repressors,” "activators,” “caps,”...
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?
3. Which of the following is not a good example of a housekeeping protein in eukaryotic...
3. Which of the following is not a good example of a housekeeping protein in eukaryotic cells? a)DNA polymerase b)histones c)RNA polymerase 4)hemoglobin Explanation: 4. Which of the following statements about histones is true? a. Histones activate transcription when bound to the promoter, b. Although RNA polymerase can access DNA packed around histones, the general transcription factors and transcriptional regulators cannot. c. Histone acetyltransferases affect transcription by adding acetyl groups to histones and altering chromatin structure to allow accessibility to...
In eukaryotic cells, there are specific transcription factors (activators) that regulate gene expression. Describe the organization...
In eukaryotic cells, there are specific transcription factors (activators) that regulate gene expression. Describe the organization of eukaryotic genes (i.e. promoters/enhancers) and how transcription factors are able to control gene expression and enzyme activity. a) Throughout the course we discussed the enzyme lactase and how it is differently regulated (and therefore expressed) in different human populations. Describe how this gene is differently expressed in different populations and when this/these change(s) are predicted to have taken place. b) Differential gene expression...
The diagram below shows two stretches of DNA in the genome of an imaginary eukaryotic cell....
The diagram below shows two stretches of DNA in the genome of an
imaginary eukaryotic cell. The top stretch of DNA includes the
fantasin gene, along with its promoter and one of its enhancers.
The bottom stretch of DNA includes the imaginin gene, its promoter,
and one of its enhancers. The slash marks (//) indicate that more
than 1,000 nucleotides separate the promoter and enhancer of each
gene
Which statements about the regulation of transcription
initiation in these genes are...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change...
Q1)Which of the following is not involved in control of gene expression in eukaryotes? A. Change to DNA sequence. B. Alternative splicing. C. Export of mRNA from the nucleus. D. Transcriptional repression. E. Destruction of mRNA Q2) Trans-acting regulators of gene expression include? A. promoters. B. histone deacetylases C. introns D. silencers E. the TATA box. Q3) Gene regulation in eukaryotes often involves which of the following, which are not also used by prokaryotes? A.RNA polymerase B.Transcription factors C.Histone modification...
E: For each of the following, indicate whether they regulate eukaryotic gene expression at the transcription...
E: For each of the following, indicate whether they regulate eukaryotic gene expression at the transcription level (prior to or during transcription), at the translation level(after transcription/formation of the immature mRNA molecule), or both. 1. Addition of the signal-recognition particle (SRP) 2. DNA methylation 3. Enhancers or insulators
In eukaryotic genomes, regions of _____________________ are transcriptionally active while regions of ____________________ are transcriptionally silent....
In eukaryotic genomes, regions of _____________________ are transcriptionally active while regions of ____________________ are transcriptionally silent. A) Heterochromatin; euchromatin B) Euchromatin; heterochromatin C) None of the above Which of the following proteins can regulate eukaryotic gene expression WITHOUT binding to the DNA in the regulatory region? A) repressors B) enhancers C) co-activators D) transcription factors In eukaryotes, transcriptional activity can be regulated by methylation of a dinucleotide sequence called "CpG." This modification occurs at a: A) Adenine B) Cytosine C)...
Draw a Eukaryotic Gene Schematic Draw features of importance at the DNA level Transcription start site +1 Promoter - as much detail as you can Gene start ATG and stop codons Transcription Regulatory Sequences such as activators/repressors and enhancers/insulators Draw features of importance at the pre-mRNA level Designate Introns and Exons Designate important Sequences to direct and regulate splicing three important sequences for the chemistry of splicing splicing regulatory sequences (ISS, ISE, ESE, ESS) Modifications at level of pre-mRNA UTRs,...
3. Which of the following is not a good example of a housekeeping protein in eukaryotic cells? a)DNA polymerase b)histones c)RNA polymerase 4)hemoglobin Explanation: 4. Which of the following statements about histones is true? a. Histones activate transcription when bound to the promoter, b. Although RNA polymerase can access DNA packed around histones, the general transcription factors and transcriptional regulators cannot. c. Histone acetyltransferases affect transcription by adding acetyl groups to histones and altering chromatin structure to allow accessibility to...
The diagram below shows two stretches of DNA in the genome of an
imaginary eukaryotic cell. The top stretch of DNA includes the
fantasin gene, along with its promoter and one of its enhancers.
The bottom stretch of DNA includes the imaginin gene, its promoter,
and one of its enhancers. The slash marks (//) indicate that more
than 1,000 nucleotides separate the promoter and enhancer of each
gene
Which statements about the regulation of transcription
initiation in these genes are...
E: For each of the following, indicate whether they regulate eukaryotic gene expression at the transcription level (prior to or during transcription), at the translation level(after transcription/formation of the immature mRNA molecule), or both. 1. Addition of the signal-recognition particle (SRP) 2. DNA methylation 3. Enhancers or insulators
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