GENETIC ANALYSIS: INTEGRATED - ACCESS
3rd Edition
ISBN: 9780135349298
Author: Sanders
Publisher: PEARSON
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Chapter 14, Problem 32P
The CRISPR
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Regarding eukaryotic genes, it is correct to state that:
a) Distal enhancer-like elements decrease the intensity of gene transcription activation
b) Mutations in intronic regions of a gene can alter the levels of its corresponding protein
c) They are regulated only by promoter regions, being activated or repressed by the presence of transcription factors
d) The junctions of exons and introns are recognized by splicing factors, which guarantee the production of the same mRNA regardless of cell type.
e) Activator and repressor proteins bind to the coding region of genes, regulating the intensity of their transcription
Regarding the process of gene transcription in eukaryotes, it is correct to state that
A)The transcription process is terminated when the RNA polymerase complex reaches the final region of the gene with the poly-adenylation signal.
B)The RNA polymerase II transcription elongation complex contains transcription factors such as the TATA box binding protein
C)The opening of the region of DNA that will be transcribed is done by the DNA helicase, present in the transcription complex.
D)The main function of the Mediator coactivator is to promote the transition between elongation and completion of the transcription process.
E)Different activators and repressors can influence the transcriptional elongation complex by binding to the promoter regions of genes
Many bacterial genes with related functions are arranged in operons, sets of contiguous genes that are under the control of a single promoter and are transcribed together. (a) What is the advantage of this arrangement? (b) How might eukaryotic cells, which do not contain operons, ensure the simultaneous transcription of different genes?
Chapter 14 Solutions
GENETIC ANALYSIS: INTEGRATED - ACCESS
Ch. 14 - 14.1 What are the advantages and disadvantages of...Ch. 14 - Prob. 2PCh. 14 - Discuss the similarities and differences between...Ch. 14 - 14.5 What are the advantages and disadvantages of...Ch. 14 - 14.6 You have cloned the mouse ortholog (see...Ch. 14 - 14.7 Diagram the mechanism by which CRISPRCas...Ch. 14 - 14.8 Describe how CRISPRCas has been modified to...Ch. 14 - 14.9 Discuss the advantages (and possible...Ch. 14 - 14.10 Discuss the advantages (and possible...Ch. 14 - You have identifies a gene encoding the protein...
Ch. 14 - You have identified a recessive mutation that...Ch. 14 - 14.13 The CBF genes of Arabidopsis are induced by...Ch. 14 - 14.14 When the S. cerevisiae genome was sequenced,...Ch. 14 - 14.15 Translational fusions between a protein of...Ch. 14 - 14.16 In humans, Duchenne’s muscular dystrophy is...Ch. 14 - 14.17 How would you perform a genetic screen to...Ch. 14 - In enhancer trapping experiments, a minimal...Ch. 14 - 14.19 In Genetic Analysis, we designed a screen to...Ch. 14 - How would you design a genetic screen to find...Ch. 14 - 14.21 The eyes of Drosophila develop from imaginal...Ch. 14 - 14.22 Given your knowledge of the genetic tools...Ch. 14 - Mutations in the CFTR gene result in cystic...Ch. 14 - 14.24 How would you clone a gene that you have...Ch. 14 - 14.25 How would you conduct a screen to identify...Ch. 14 - In land plants, there is an alternation of...Ch. 14 - 14.27 The Drosophila evenskipped (eve) gene is...Ch. 14 - Prob. 28PCh. 14 - 14.29 As shown in Figure, mutations in the...Ch. 14 - How would you edit a specific nucleotide in a...Ch. 14 - Through a forward genetics screen in Arabidopsis...Ch. 14 - The CRISPR - Cas 9 complex directs the Cas 9...Ch. 14 - 14.33 Describe how enhancer screens can be used to...Ch. 14 - How might you use CRISPR - Cas 9 to create a large...
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- Using the transcription unit diagrammed below, in which exons are represented by blue boxes and introns are represented by the connecting lines. You discover a single base deletion in region E of this DNA sequence. Regarding transcription, this mutation will likely: 1.) Result in an alteration to the mRNA sequence. 2.)Have no effect on transcription or the mRNA sequence 3.)Prevent transcription at the TATAA box 4.) Result in an increase or decrease in the amount of mRNA transcribedarrow_forwardWhich of the following statements is true regarding the lys2-128d reporter? Select all that apply. a.) Mutants that activate this reporter are likely to have mutations in PIC components. b.) This reporter is sensitive to changes in chromatin maintenance because the start site is located within the ORF. c.) Mutants that activate this reporter cause downstream shifts in transcription start site selection. d.) This reporter is being used to help us rule out mutations that are likely impacting chromatin structure.arrow_forwardWhen Laybourne and Kadonaga studied the effects of histone proteins on eukaryotic transcription using an in vitro transcription assay explain why: a) they used two different DNA templates that contained different promoter structures. b) when they included both activator protein and histones, they always added the histone proteins before adding the activator to the transcription assay mixture. (Ctri) -arrow_forward
- a) what is a promoter and give the element and their functions of E.coli promoter b) what are eukaryotic transcription factor and list the class 2 general transcription factors and state their functionsarrow_forwardRegarding eukaryotic genes, it is correct to state that: * A) Distal enhancer-like elements decrease the intensity of gene transcription activation B)Mutations in intronic regions of a gene can alter the levels of its corresponding protein C)They are regulated only by promoter regions, being activated or repressed by the presence of transcription factors D)The junctions of exons and introns are recognized by splicing factors, which ensure the production of the same mRNA regardless of cell type. E) Activator and repressor proteins bind to the coding region of genes, regulating the intensity of their transcriptionarrow_forwardHow do you think that transcription randomizes positions of nucleosomes and repression restores the ordering after transcription? How might you test to see if there was an exchange of histone subunits during transcription or if the nucleosome is truly transferred as a single unit? Would you expect the DNA band representing the distance from the restriction enzyme site to the hypersensitive site to be a single band or a smear? Defend your answer.arrow_forward
- A newly identified protein from the cells of the Panopyra plant on Pandora was shown to inhibit translation of its target genes by binding to the 5’ UTR of the mRNA and preventing ribosome binding. A possible way this inhibition may be relieved by an sRNA would be: Group of answer choices a)The sRNA acts as a silencer, suppressing the inhibitory protein and allowing translation to take place. b)The sRNA acts as a decoy, sequestering the inhibitory protein and allowing translation to take place. c)The sRNA acts as a marker, flagging the inhibitory protein for ubiquitination and allowing translation to take place.arrow_forwardRecombinant expression in prokaryotic systems has numerous advantages when compared to eukaryotic systems, one of which is the ability to produce the protein of interest at high levels. For this, it is essential to use strong promoters and genetically modified bacteria capable of overexpressing the exogenous gene. Therefore, mark the alternative that best represents the set of bacterial promoters/strains for protein overexpression. * A)use of the T7 promoter, whose induction occurs by the addition of IPTG in the culture medium, and use of the Escherichia coli strain BL21DE3. B)use of the T7 promoter, whose induction occurs by the addition of IPTG in the culture medium, and use of the Escherichia coli DH5 strain. C)use of the lac promoter, whose induction occurs by the addition of IPTG in the culture medium, and use of the Escherichia coli DH5 strain. D) use of the constitutive trp promoter, whose induction occurs by the addition of the amino acid Tryptophan in the medium, and use of…arrow_forwardDescribe what would happen to the lac operon in a low-lactose environment and in a high lactose environment. a) How will each of these environments affect gene expression? b) What would happen to the repressor in each case? c) How will each of these environments affect RNA polymerase?arrow_forward
- Chromatin Immunoprecipitation (ChIP) experiments enable researchers to measure the levels of transcription factors, coactivators/corepressors and chromatin remodeling complexes on a specific gene in cells. In the ChIP experiment below, the recruitment of the transcription factor NfkB, Histone Deacetylase Complex (HDAC3) and p300/CBP complex to the Interleukin 12 (IL12) gene at various times (0, 30, 60 and 120 min) after treating cells with LPS are measured. Does LPS stimulate or inhibit transcription of the IL12 gene based on the recruitment of factors to the IL12 gene. Justify your answer by explaining the state of the gene before LPS and after LPS treatment (limit 5-6 sentences).arrow_forwardThe interphase nucleus is a highly structured organelle with chromosome territories, interchromatin compartments, and transcription factories. In cultured human cells, researchers have identified approximately 8000 transcription factories per cell, each containing an average of eight tightly associated RNAP II molecules actively transcribing RNA. If each RNAP II molecule is transcribing a different gene, how might such a transcription factory appear? Provide a simple diagram that shows eight different genes being transcribed in a transcription factory and include the promoters, structural genes, and nascent transcripts in your presentation.arrow_forwardIn the bacteriophage T7 system used to express recombinant proteins, the gene of interest is fused to T7 promoter and T7 RNA polymerase is separately cloned into the same cell. What is the main reason this system uses T7 RNA polymerase instead of relying on the bacterial RNA polymerase? To restrict the expression of bacterial protein expression To enhance the amount of recombinant protein expression To enhance the expression of bacterial protein expression To restrict the amount of recombinant protein expression To enable the expression of T7 viral protein expressionarrow_forward
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