Foundations in Microbiology
10th Edition
ISBN: 9781259705212
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 9.3, Problem 21CYP
Summary Introduction
To determine:
A diagram for figures 9.20 and 9.21, indicating the reverse of events.
Introduction:
Figures 9.20 and 9.21 represent the lac operon (inducible operon) and the arg operon (repressible operon). A diagram for the reverse of events in these operons must indicate the return of the operons to their respective normal conditions.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
1.
A)Explain the mechanism by which the lac operon is sensitive to glucose levels (presence and absence of glucose).
B)If glucose levels in the cell are high and lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon?
1.
The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and trans-acetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. Choose from the following answers. i- p+ o+ z+ y- a+ / i+ p+ oc z- y- a+
Answer choices
UII
UIC
UUU
ICC
CUC
IUC
CCU
2.
The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and trans-acetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. Choose from the following answers. i- p+ o+ z- y+ a+ / iS p+ o+ z- y+ a+
Answer choices
ICC
CCU
UII
IUC
UIC
CUC
UUU
1. If the above gene is one of the three structural genes of the lac operon that codes for theprotein/ enzyme responsible for breaking lactose into two molecules of simple sugars,a.) what triggers the activation of this gene?b.) what triggers the inactivation of this gene?c.) what substance is attached to the operator region of the operon in the absence ofactivator?d.) what gene is responsible for the synthesis of the substance used to attach in theoperator region in the absence of activator?
e.) what substance is attached to the promoter region of the operon in this case?
Chapter 9 Solutions
Foundations in Microbiology
Ch. 9.1 - 1. Define heredity, genetics, genome, gene,...Ch. 9.1 - 2. Compare the basic nature of genetic material in...Ch. 9.1 - 3. Explain how DNA is organized and packaged.Ch. 9.1 - 4. Describe the chemical structure of DNA and Its...Ch. 9.1 - Prob. 5ELOCh. 9.1 - 6. Describe the process of DNA replication as it...Ch. 9.1 - 1. Compare the genetic material of eukaryotes,...Ch. 9.1 - 2. Characterize the organization of genetic...Ch. 9.1 - Prob. 3CYPCh. 9.1 - 4. What are the fundamental building blocks of DNA...
Ch. 9.1 - 5. Describe what is meant by the antiparallel...Ch. 9.1 - 6. Explain the synthesis of the leading and...Ch. 9.1 - 7. Name several characteristics of DNA structure...Ch. 9.2 - Prob. 7ELOCh. 9.2 - Prob. 8ELOCh. 9.2 - 9. Describe the different types of RNA and their...Ch. 9.2 - Prob. 10ELOCh. 9.2 - 11. Describe the genetic code, codons, and...Ch. 9.2 - 12. Recount the participants and steps in...Ch. 9.2 - Prob. 13ELOCh. 9.2 - 8. How is the language of a gene expressed?Ch. 9.2 - Prob. 9CYPCh. 9.2 - 10. Construct a table that compares the structure...Ch. 9.2 - Prob. 11CYPCh. 9.2 - Prob. 12CYPCh. 9.2 - Prob. 13CYPCh. 9.2 - Prob. 14CYPCh. 9.2 - 15. Briefly describe the events in translation.Ch. 9.2 - Prob. 16CYPCh. 9.2 - 17. Summarize how bacterial and eukaryotic cells...Ch. 9.2 - Prob. 18CYPCh. 9.3 - 14. Explain the functions of operons in bacterial...Ch. 9.3 - 15. Describe the main features of the lactose...Ch. 9.3 - 16. Describe the main features of repressible...Ch. 9.3 - 17. Summarize some aspects of genetic control by...Ch. 9.3 - 19. What is an operon? Describe the functions of...Ch. 9.3 - 20. Compare and contrast the lac operon and...Ch. 9.3 - Prob. 21CYPCh. 9.3 - 22. At which levels of DNA regulation do small...Ch. 9.4 - Prob. 18ELOCh. 9.4 - Summarize the causes and types of mutations and...Ch. 9.4 - Prob. 20ELOCh. 9.4 - Compare beneficial and detrimental effects of...Ch. 9.4 - Explain what is meant by the terms mutation and...Ch. 9.4 - Describe the primary causes, types, and outcomes...Ch. 9.4 - Explain the purposes behind replica plating and...Ch. 9.5 - Explain recombination in bacteria and what it...Ch. 9.5 - Describe the main features of conjugation and its...Ch. 9.5 - Prob. 24ELOCh. 9.5 - Identify the basic processes involved in...Ch. 9.5 - Discuss transposons and their importance to...Ch. 9.5 - Compare conjugation, transformation, and...Ch. 9.5 - Explain the differences between general and...Ch. 9.5 - By means of a flowchart, show the possible jumps...Ch. 9.6 - Explain the major elements of viral genetics.Ch. 9.6 - Compare aspects of the genetics of DNA and RNA...Ch. 9.6 - Explain why some viruses must enter the nucleus to...Ch. 9.6 - Explain the difference between positive-strand and...Ch. 9.6 - Outline the basic steps in the replication cycles...Ch. 9.L1 - What is the smallest unit of heredity (genotype)?...Ch. 9.L1 - Prob. 2MCQCh. 9.L1 - The nitrogen bases in DNA are bonded to the a....Ch. 9.L1 - DNA replication is considered semiconservative...Ch. 9.L1 - In DNA, adenine is the complementary base for...Ch. 9.L1 - The base pairs are held together primarily by a....Ch. 9.L1 - Why must the lagging strand of DNA be replicated...Ch. 9.L1 - Messenger RNA is formed by _______ of a gene on...Ch. 9.L1 - Prob. 9MCQCh. 9.L1 - Prob. 10MCQCh. 9.L1 - Prob. 11MCQCh. 9.L1 - Prob. 12MCQCh. 9.L1 - Prob. 13MCQCh. 9.L1 - Prob. 14MCQCh. 9.L1 - Which genetic material could be transmitted...Ch. 9.L1 - Prob. 16MCQCh. 9.L1 - Which of the following is present in prokaryotes...Ch. 9.L1 - Multiple Matching. Fill in the blanks with all the...Ch. 9.L1 - Prob. 1CSRCh. 9.L1 - Prob. 2CSRCh. 9.L1 - Explain how it would be possible for A. baumannii...Ch. 9.L1 - Prob. 1WCCh. 9.L1 - Prob. 2WCCh. 9.L1 - The following sequence represents triplets on DNA:...Ch. 9.L1 - Describe the actions οf all of the enzymes...Ch. 9.L1 - Prob. 5WCCh. 9.L1 - Examine the following series of words and identify...Ch. 9.L2 - Knowing that retroviruses operate on the principle...Ch. 9.L2 - Using the piece of DNA in writing-challenge...Ch. 9.L2 - Why will a mistake in the RNA code alone not...Ch. 9.L2 - The enzymes required to carry out transcription...Ch. 9.L2 - Prob. 5CTCh. 9.L2 - Activation, transcription, and translation of the...Ch. 9.L2 - Explain the mechanisms by which RNA can control...Ch. 9.L2 - Ex�Ιain how epigenetics is related to the...Ch. 9.L2 - Use the concepts of chapters, letters, a whole...Ch. 9.L2 - From figure 9.17, step 3. Label each part of the...Ch. 9.L2 - Examine figure 8.11, and explain which type of...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The a/a operon is an inducible operon that controls the production of the sugar arabinose. When arabinose is present in a bacterium it binds to the protein AraC, and the complex binds to the initiator site to promote transcription. In this scenario, AraC is a(n). activator inducer repressor operatorarrow_forwardIf glucose is absent, but so is lactose, the lac operon will be. activated repressed activated, but only partially mutatedarrow_forwardDiscuss Concepts In a mutant strain of E. coli, the CAP protein is unable to combine with its target region of the lac operon. How would you expect the mutation to affect transcription when cells of this strain are subjected to the following conditions? Lactose and glucose are both available. Lactose is available but glucose is not. Both lactose and glucose are unavailable.arrow_forward
- 1e regulation of the lac operon by cAMP-CAP complex is an example of positive regulation. what in general does it mean to say that a gene or operon is subject to positive regulation?arrow_forward1. a)how is it possible for such drugs to selectively kill bacterial cells and not our own cells? b)Provide an example of post-translational regulation of protein activity and explain the advantage of regulating each protein/process at the post-translational level instead of the transcriptional level.arrow_forward1. What is the default state of the lac operon? a. LacI repressor is sitting on the operator sequence and blocks RNAP from transcribing lacZYA. b. LacI repressor is not in a correct shape to bind to the operator sequence. c. LacI repressor is not produced in the absence of lactose. d. Allolactose is sitting on the operator sequence and blocks RNAP from transcribing lacZYA.arrow_forward
- 1. Explain why catabolite repression is used in regulating the lac operon anddescribe how it fine-tunes B-galactosidase synthesis. 2.arrow_forward1. a) If glucose is not available and lactose is absent from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon? b)If glucose is not available, but lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon? b)arrow_forward1. How does induction control enzyme synthesis using lactose operon? 2. Describe how level of a key metabolite [tryptophane] controls the gene function using tryptophane operonarrow_forward
- Give all possible genotypes of a lac operon that produces, or fails to produce, β-galactosidase and permease under the following conditions. Do not give partial-diploid genotypes. Lactose absent Lactose present β-Galactosidase Permease β-Galactosidase Permease a. − − + + b. − − − + c. − − + − d. + + + + e. − − − − f. + − + − g. − + − +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_forward2) Name and describe two types of constitutive mutants of the lactose operon.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY