Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 15.1, Problem 1CC
How does binding of the trp corepressor to its repressor alter repressor function, and transcription? What about binding of the lac inducer to its repressor?
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If some cell-surface receptors, including Notch, can rapidly signal to the nucleus by activating latent transcription regulators at the plasma membrane, why do most cell- surface receptors use long, indirect signaling cascades to influence gene transcription in the nucleus?
Chapter 15 Solutions
Campbell Biology In Focus
Ch. 15.1 - How does binding of the trp corepressor to its...Ch. 15.1 - Describe the binding of RNA polymerase,...Ch. 15.1 - WHAT IF? A certain mutation in E. coli changes the...Ch. 15.2 - Prob. 1CCCh. 15.2 - Compare the roles of general and specific...Ch. 15.2 - Prob. 3CCCh. 15.3 - WHAT IF? Suppose the mRNA being degraded in Figure...Ch. 15.3 - MAKE CONNECTIONS Inactivation of one of the X...Ch. 15.4 - Describe the role of complementary base pairing...Ch. 15.4 - WHAT IF? Study the microarray in Figure 15.17. If...
Ch. 15 - If a particular operon encodes enzymes for making...Ch. 15 - The functioning of enhancers is an example of A. a...Ch. 15 - Which of the following is an example of...Ch. 15 - Prob. 4TYUCh. 15 - Prob. 5TYUCh. 15 - Which of the following would not be true of cDNA...Ch. 15 - Prob. 7TYUCh. 15 - SCIENTIFIC INQUIRY Imagine you want to study one...Ch. 15 - FOCUS ON EVOLUTION DNA sequences can act as tape...Ch. 15 - FOCUS ON INTERACTIONS In a short essay (100150...Ch. 15 - Prob. 11TYU
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- How does each of these small GTP-binding proteins contribute to the regulation of cell migration?arrow_forwardThe binding of a small effector molecule, protein-protein interactions, and covalent modifications are three common ways to modulate the activities of transcription factors. Which of these three mechanisms are used by steroid receptors and by the CREB protein?arrow_forwardWhat critical roles does the TFIIH CTD kinase play in regulating the switch from a pre-initiation complex to a post-initiated complex? How does the kinase affect downstream RNA processing?arrow_forward
- What is the effect of an increased Cro concentration on the expression of the gene for the λ repressor? Of an increased concentration of λ repressor on the expression of the Cro gene? Of an increased concentration of λ repressor on the expression of the λ repressor gene?arrow_forwardhow does phosphorylation of eukaryotic transcription factors regulate the function, using two types of regulatory effects of phosphorylation on named transcription factorsarrow_forwardWhich of the following is the most likely result of a mutation in the lac operator that prevents release of the depressor protein? Choose 1 answer: (A)The lactose permease protein will be produced, even in the absence of lactose. (B) Transcription of the structural genes will be blocked, even in the presence of lactose. (C) The catabolite activator protein will be bound to the CAP site, even in the presence of glucose. (D) Expression of the lacI gene will be repressed, even in the absence of glucose.arrow_forward
- which of the following correctly describes how protein kinase A can activate genes? A: nuclear protein kinase A is activated by cAMP to phosphorylate general transcription factors B: cytosolic protein kinase A is activated by cAMP to release the catalytic subunits, which move into the nucleus and phosphorylate CREB C: cytosolic protein kinase A is activated by cAMP to release the catalytic subunits, which move into the nucleus and phosphorylate general transcription factors D: G protein-coupled receptors may be desensitized by serine phosphorylationarrow_forwardHow would a mutation which prevented Gal3 from binding to Gal80 affect gene expression from the GAL promoter?arrow_forwardWhat are the transcription factors in eukaryotes? What is the role of transcription factors? What are the two types of transcription factors?arrow_forward
- Transcriptional regulators are proteins that bind to promoters (at the 5’ flanking regions of genes) to regulate their transcription. Assume that a particular transcription regulator normally promotes transcription of gene X that codes for a membrane transport protein. If a mutation makes this transcription regulator nonfunctional, would the resulting phenotype be similar to a deleterious mutation in the membrane transporter itself? Why or why not?arrow_forwardPhorbol esters have been observed to induce the transcription of AP-1–influenced genes. Explain how this processcould occur. What are the consequences of AP-1 transcription? What role does intermittent exposure to phorbol estershave on an individual’s health?arrow_forwardDiscuss in general terms the principle of the regulation of theexpression of the trp gene with attenuation in bacteria.arrow_forward
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