Essentials of Genetics - Masteringgenetic
9th Edition
ISBN: 9780134143699
Author: KLUG
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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Describe the mechanism by which cAMP receptorprotein (CRP), the regulatory protein for catabolite repression, functions. Use the lactose operon as an example.
Explain the role of CAP and cAMP in the regulation of the lac-operon.
Activation, transcription, and translation of the lac operon willrelease which exact nutrients?
Chapter 15 Solutions
Essentials of Genetics - Masteringgenetic
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 the regulation of the lac operon when lactose is present and glucose is absentarrow_forwardIn terms of the trp operon, differentiate between two normal bacterial cultures, one grown in a medium supplied with tryptophan and the other medium without tryptophan.arrow_forwarddescribe the actions of the normal and mutated lac operon in absence of lactose.use picture if possible step by step.arrow_forward
- Contrast the functions of Spo11 and Cas9, twoenzymes that catalyze the formation of doublestrand breaksarrow_forwardExplain how Tryptophan acts as an effector?arrow_forwardWhat is meant by the differential activation of genes? Explain how this affects the synthesis of cutin and P-protein.arrow_forward
- How does the tryptophan operan turn back on in gene regulation?arrow_forwardDescribe the role of the CRP–cAMP complex in positiveregulation of the lactose operon in E. coli.arrow_forwardAttenuation affects anabolic pathways, whereas repression affects either anabolic or catabolic pathways. Provide an explanation for thisarrow_forward
- Describe four mechanisms that result in the generation ofantigen receptor diversity.arrow_forwardExplain why inactivation of the O1 sequence of the lac operator almost completely abolishes repression of the lac operon.arrow_forwardBy using separate labelled diagrams, describe as detail as possile the actions of the normal and mutated lac operon in absence of lactose.arrow_forward
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