Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 17, Problem 5P
As shown in the following diagram, a single
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Which of the following is true of CpG islands?
a. They are methylated near promoters of actively transcribed genes.
b. They are unmethylated near promoters of actively transcribed genes.
c. Acetylation of CpG islands leads to repression of transcription.
d. CpG islands code for RNA molecules that activate transcription.
An enhancer, located upstream from a gene, has the following sequence:
5′–GTAG–3′ 3′–CATC–5′
This enhancer is orientation-independent. Which of the following sequences also works as an enhancer?
A. 5′–CTAC–3′ 3′–GATG–5′
B. 5′–GATG–3′ 3′–CTAC–5′
C. 5′–CATC–3′ 3′–GTAG–5′ C15.
In 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 expression
Chapter 17 Solutions
Genetics: From Genes to Genomes
Ch. 17 - For each of the terms in the left column, choose...Ch. 17 - For each of the following types of gene...Ch. 17 - List five events other than transcription...Ch. 17 - Which eukaryotic RNA polymerase RNA pol I, pol II,...Ch. 17 - As shown in the following diagram, a single...Ch. 17 - You have synthesized an enhancerless GFP reporter...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - A single UAS regulates the expression of three...Ch. 17 - MyoD is a transcriptional activator that turns on...
Ch. 17 - a. Assume that two transcription factors are...Ch. 17 - Prob. 12PCh. 17 - In Problem 12, you identified a genomic region...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Genes in both prokaryotes and eukaryotes are...Ch. 17 - Prob. 17PCh. 17 - Lysine 4 of histone H3 H3K4 is methylated in the...Ch. 17 - J.T. Lis and collaborators have developed an...Ch. 17 - Hydatiform moles are growths of undifferentiated...Ch. 17 - Prader-Willi syndrome is caused by a mutation in...Ch. 17 - The human IGF2 gene is autosomal and maternally...Ch. 17 - Follow the expression of a paternally imprinted...Ch. 17 - Reciprocal crosses were performed using two inbred...Ch. 17 - Interestingly, imprinting can be tissue-specific....Ch. 17 - Prob. 26PCh. 17 - A method for detecting methylated CpGs involves...Ch. 17 - Honeybees Apis mellifera provide a striking...Ch. 17 - Consider the experiment in Fig. 17.24, where the...Ch. 17 - A protein or RNA that regulates gene expression in...Ch. 17 - a. How can a single eukaryotic gene give rise to...Ch. 17 - A hunchback gene, a gene necessary for proper...Ch. 17 - You know that the mRNA and protein produced by a...Ch. 17 - You are studying a transgenic mouse strain that...Ch. 17 - Prob. 35PCh. 17 - Scientists have exploited the siRNA pathway to...Ch. 17 - Persimmons Diospyros lotus are dioecious plants,...Ch. 17 - Drosophila females homozygous for loss-of-function...Ch. 17 - The text has discussed the RNA-Seq technique,...Ch. 17 - Researchers know that Fru-M controls male sexual...Ch. 17 - The Drosophila gene Sex lethal Sxl is deserving of...Ch. 17 - Figure 17.29 shows that the Sxl protein binds to...
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- Which of the following mutations could be appropriately describedas a position effect?A. A point mutation at the –10 position in the promoter regionprevents transcription. B. A translocation places the coding sequence for a muscle-specificgene next to an enhancer that is turned on in nerve cells.C. An inversion flips a gene from the long arm of chromosome 17(which is euchromatic) to the short arm (which isheterochromatic).arrow_forwardIn eukaryotic cells, which of the following is typical of how transcription is regulated? Group of answer choices Activators and enhancers at sites distant from structural genes interact to increase or decrease transcription Regulatory genes are always tightly coupled in physical proximity to the structural genes they regulate There are only a few transcription factors that are functional in eukarya Attenuation, where translation and transcription are tightly coupled, is common.arrow_forwardWhich of the following is an explanation for how there can be differential gene expression throughout a multicellular organism? A) There are unique sets of genes present in the different tissues of the organisms B) Some tissues have histones, while other cells do not use histones C) There are unique combinations of transcription factors in different tissues of the organism D) Different tissues throughout the organism use different genetic coding rules .arrow_forward
- The insertion of transposable elements into genes can alter the normal pattern of expression. In the following situations, describe the possible consequences on gene expression.a. A LINE inserts into an enhancer of a human gene. b. A transposable element contains a binding site for a transcriptional repressor and inserts adjacent to a promoter. c. An Alu element inserts into the 3′ splice (AG) site of an intron in a human gene. d. A Ds element that was inserted into the exon of a maize gene excises imperfectly and leaves three base pairs behind in the exon. e. Another excision by that same Ds element leaves two base pairs behind in the exon. f. A Ds element that was inserted into the middle of an intron excises imperfectly and leaves five base pairs behind in the intron.arrow_forwardTOH1 protein is typically expressed at the same level in kidney and stomach cells and is essential to appropriate function of both organs. TOH disorder is a disorder where no detectable TOH1 protein is present in kidney cells due to a mutation in the promoter leading to no transcription. No other organs are affected in TOH disorder. You used microarray analysis to examine cells from kidney and stomach cells from the same individual with TOH disorder. You labeled the cDNA from the affected kidney cells with red fluorescent nucleotides, and you labeled the cDNA from the unaffected stomach cells with green fluorescent nucleotides. After you mixed the cDNAs and allowed for hybridization, what color would you expect to see for the spot for the TOH1 gene when you analyze the microarray data? a) Red b) Green c) Black d) Yellowarrow_forwardA translocation mutation results in a silencer being inserted just upstream of the promoter of a gene (Gene X). How would you predict the expression of gene X be affected by this mutation? Gene X will not be expressed in any cell that has this mutation Gene X will not be expressed in any cell that has this mutation and the appropriate repressor protein Gene X will be expressed in any cell that has this mutation Gene X will be expressed in any cell that has this mutation and the appropriate repressor proteinarrow_forward
- What role does an operator sequence serve in bacterial gene expression regulation? Describe one change in bacterial cells that can cause a repressor protein to go from inactive to active or from active to inactive.arrow_forwardHow can methylation affect transcription? a. It may prevent the binding of regulatory transcription factors. b. It may enhance the binding of regulatory transcription factors. c. It may attract methyl-CpG-binding proteins, which inhibit transcription, to bind to a methylated sequence. d. All of the above are possible ways for methylation to affect transcriptionarrow_forwardThe yeast gene SER3, whose product has a role in serine biosynthesis, is repressed during growth in nutrient-rich medium, so little transcription takes place, and little SER3 enzyme is produced, under these conditions. In an investigation of the repression of the SER3 gene, a region of DNA upstream of SER3 was found to be heavily transcribed when SER3 is repressed ). Within this upstream region is a promoter that stimulates the transcription of an RNA molecule called SRG1 RNA (for SER3 regulatory gene 1). This RNA molecule has none of the sequences necessary for translation. Mutations in the promoter for SRG1 result in the disappearance of SRG1 RNA, and these mutations remove the repression of SER3. When RNA polymerase binds to the SRG1 promoter, the polymerase travels downstream, transcribing the SGR1 RNA, and passes through and transcribes the promoter for SER3. This activity leads to the repression of SER3. Propose a possible explanation for how the transcription of SGR1 might…arrow_forward
- A disease is caused by having no functional protein produced from the kip gene. An individual has this disease but has no mutation in the kip gene. You look at other gene candidates that could result in no functional kip protein. A gene called D5 codes for a methyltransferase that methylates the kip promoter region. A gene called T3 codes for an acetylase that acetylates the histones in the region of the kip gene. Fill in the following blanks. In the situation described above, in which no kip protein is made, it is likely that the D5 gene has a mutation that ___________ the D5 protein or that the T3 gene has a mutation that ___________the T3 protein. Blanks can either be deactivates or activatesarrow_forwardHow do I draw the sequence and explain the process for each step? Draw the sequence of molecular events that occurs to induce STAT transcription factor localization to the nucleus. To complete this, you will draw the first step that occurs, then draw a new figure with the second step that occurs, then draw a new figure with the third step that occurs, and so on until you have completed all of the steps. On the drawing, briefly label each molecular event (each drawing). For this brief label, explain what is happening during each step.arrow_forwardA bidirectional enhancer has the following sequence: 5′–GTCA–3′ 3′–CAGT–5′ Which of the following sequences would also be a functional enhancer? a. 5′–ACTG–3′ 3′–TGAC–5′ b. 5′–TGAC–3′ 3′–ACTG–5′ c. 3′–GTCA–5′ 5′–CAGT–3′ d. 3′–TGAC–5′ 5′–ACTG–3′arrow_forward
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