Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 14.2, Problem 2EQ
CoreSKILL » What was the eventual hypothesis proposed by the researchers to explain the function of the lacI gene and the regulation of the lac operon?
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Chapter 14 Solutions
Biology
Ch. 14.1 - Prob. 1CCCh. 14.2 - Which genes are under the control of the lac...Ch. 14.2 - With regard to regulatory proteins and small...Ch. 14.2 - What were the key observations made by Jacob,...Ch. 14.2 - CoreSKILL What was the eventual hypothesis...Ch. 14.2 - Prob. 3EQCh. 14.2 - Core Skill: Connections Look back at Fig 9.12....Ch. 14.2 - What are the advantages of having both an...Ch. 14.2 - Prob. 2CSCh. 14.3 - Prob. 1CC
Ch. 14.4 - What are the two opposing effects that histone...Ch. 14.4 - Prob. 1CSCh. 14.5 - Prob. 1CCCh. 14.5 - Prob. 2CCCh. 14 - Prob. 1TYCh. 14 - Prob. 2TYCh. 14 - Transcription factors that bind to DNA and...Ch. 14 - Prob. 4TYCh. 14 - For the lac operon, what would be the expected...Ch. 14 - Prob. 6TYCh. 14 - The trp operon is considered _____ blank operon...Ch. 14 - Prob. 8TYCh. 14 - Prob. 9TYCh. 14 - _____ blank refers to the process that allows a...Ch. 14 - Prob. 1CQCh. 14 - Transcriptional regulation often involves a...Ch. 14 - Prob. 3CQCh. 14 - Discuss the advantages and disadvantages of...Ch. 14 - Discuss the advantages and disadvantages of...
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- What structural features does the trp operon share with the lac operon?arrow_forwardQ1. Bioluminescence is emitted by the marine bacterium Vibrio fischeri in response to the concentration of a chemical signal. The luxCDABEG genes form part of an operon that encodes all of the structural components necessary for light production. At high cell density, the concentration of the inducer increases and can bind to LuxR protein which then activates transcription of the operon. What kind of operon is the Lux operon? [Positive Inducible, Positive Repressible, Negative Inducible, Negative Repressible?] Q2. A population of bacteria has a Lux operon that produces bioluminesence via an autoinducer that activates a transcription factor. You grow a flask of cells that have a loss-of-function mutation in the gene that encodes the enzyme that produces an autoinducer. What is the predicted bioluminesence in this population at high and low density?arrow_forwardQ. How and why we do molecular cloning of enzymes?arrow_forward
- Q1. Genome-wide RNAi screens target expression of > 16,000 genes. Explain how each of these 16,000+ bacterial strains would be engineered in order that they only cause gene silencing of the intended target.arrow_forwardExplain how HOTAIR plays a role in the transcriptional regulationof particular genes.arrow_forwardMAKE CONNECTIONS Mutagens are chemical andphysical agents that induce mutations in DNA (seeConcept 17.5). How does reduced ozone concentrationin the atmosphere increase the likelihood of mutationsin various organisms?arrow_forward
- Q. Given the complicated steps necessary to convert DNA to RNA to protein and the fact that RNAs can catalyze reactions, speculate on why cells ever evolved proteins at all. Why not simply use catalytic RNAs?arrow_forwardexplanation summary You now add tryptophan to the cell. What would happen to the bacterial cell and its trp operon?arrow_forwardQ1 a) List four key genetic features that a plasmid needs to be maintained in the bacterial cells and to measure gene expression of an acid inducible promoter driving GFP expression. b)arrow_forward
- Reflect on this "Gene therapy is still in its infancy, but its believe that as it matures, it will become an effective treatment for the myriad of genetic diseases that effect humanity ?arrow_forwardQ. How expression systems can be developed to purify the protein of interest?arrow_forwardWHAT IF? Suppose X-rays caused a sequence changein the TATA box of a particular gene’s promoter. Howwould that affect transcription of the gene? (SeeFigure 17.9.)arrow_forward
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