Essentials of Genetics (9th Edition) - Standalone book
9th Edition
ISBN: 9780134047799
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 13PDQ
Describe the role of attenuation in the regulation of tryptophan biosynthesis.
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Explain the process of attenuation of the trp operon under high tryptophan levels.
Describe the mechanism by which cAMP receptorprotein (CRP), the regulatory protein for catabolite repression, functions. Use the lactose operon as an example.
Describe four mechanisms that result in the generation ofantigen receptor diversity.
Chapter 15 Solutions
Essentials of Genetics (9th Edition) - Standalone book
Ch. 15 -
CASE STUDY | A mysterious muscular dystrophy
A...Ch. 15 -
CASE STUDY |A mysterious muscular dystrophy
A...Ch. 15 -
CASE STUDY |A mysterious muscular dystrophy
A...Ch. 15 -
HOW DO WE KNOW?
1. In this chapter, we have...Ch. 15 -
2. Review the Chapter Concepts list on p. 280....Ch. 15 - Describe which enzymes are required for lactose...Ch. 15 - Contrast positive versus negative regulation of...Ch. 15 -
5. Both attenuation and riboswitches rely on...Ch. 15 - For the lac genotypes shown in the accompanying...Ch. 15 -
7. For the genotypes and conditions (lactose...
Ch. 15 -
8. The locations of numerous lacI– and lacIs...Ch. 15 - Explain why catabolite repression is used in...Ch. 15 - Describe experiments that would confirm whether or...Ch. 15 - Predict the level of genetic activity of the lac...Ch. 15 - Predict the effect on the inducibility of the lac...Ch. 15 -
13. Describe the role of attenuation in the...Ch. 15 -
14. In a theoretical operon, genes A, B, C, and D...Ch. 15 - A bacterial operon is responsible for production...Ch. 15 - A marine bacterium is isolated and is shown to...Ch. 15 -
17. Why is gene regulation more complex in a...Ch. 15 -
18. List and define the levels of eukaryotic gene...Ch. 15 -
19. Distinguish between the cis-acting regulatory...Ch. 15 - Prob. 20PDQCh. 15 - Compare the control of gene regulation in...Ch. 15 - Many eukaryotic promoter regions contain CAAT...Ch. 15 -
23. What is RNA-induced gene silencing in...Ch. 15 - Although it is customary to consider...Ch. 15 - DNA methylation is commonly associated with a...Ch. 15 - The interphase nucleus appears to be a highly...Ch. 15 - It has been estimated that at least two-thirds of...
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- Describe in detail how a tryptophan attenuator iscontrolledarrow_forwardDiscuss in general terms the principle of the regulation of theexpression of the trp gene with attenuation in bacteria.arrow_forwardDescribe the role of the CRP–cAMP complex in positiveregulation of the lactose operon in E. coli.arrow_forward
- What is meant by the differential activation of genes? Explain how this affects the synthesis of cutin and P-protein.arrow_forwardDescribe the regulation of expression of the lac Z, Y and A genes in E.coli when there is LOW glucose and HIGH lactose present in the cell.arrow_forwardwhat is the nature and likely location(s) of a mutant that would, 1)allow constitutive expression of the lac gene? 2)prevent the cell from responding to lactose ( genes are not induced when exposed to lactose)? 3) not allow the cell to utilize lactose even when the genes are inducedarrow_forward
- Outline one mechanism used by activated mTOR to increase global translation in the cell.arrow_forwardThe ras protein is a mutated G protein that lacks GTPase activity. How does the absence of this activity affect the adenylyl cyclase pathway?arrow_forwardWhat effect does binding of the IRF protein to the IRE in the mRNA encoding ferritin have on the production of ferritin? Briefly explain why this effect is observed.arrow_forward
- Explain the function(s) of Hsp90. Name two factors which lead to the increase of this protein in cells.arrow_forwardAttenuation affects anabolic pathways, whereas repression affects either anabolic or catabolic pathways. Provide an explanation for thisarrow_forwardWhat would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? (Explain what would happen in both the presence and absence of tryptophan)arrow_forward
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