Genetics: Analysis and Principles
5th Edition
ISBN: 9780073525341
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 18, Problem 27CONQ
Summary Introduction
To review:
The effects on replication of the given DNA (deoxyribonucleic acid) sequence after the following treatments:
Treatment with nitrous acid.
Treatment with nitrous acid, followed by its removal, and then continued replication of DNA.
Introduction:
Nitrous acid is a common chemical agent that can act as a mutagen and causes deamination of bases. This can lead to a cytosine (C) getting converted into uracil (U), or adenine (A) getting converted into hypoxanthine (H), which can cause mutations in the DNA sequence.
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19. On the diagram below
a. Label the three pictures as: DNA; polypeptide; or RNA.
b. Label the arrows as: translation or transcription/RNA processing.
c. Add the following details to the diagram.
Promoter region
TATA box
Transcription start site
Transcription terminator
Intron (A,B,C,D)
Exons (1,2,3,4,5)
Splice sites
5' cap
5' UTR (untranslated region)
3' poly A tail
3' UTR (untranslated region)
Translational start (AUG)
Translational stop (UGA, UAG, or UAA)
N and C ends of polypeptide
0000
Match the letter labels in the figure below to the terms. Some letter
labels are not used.
MNNNNNNIN
M
C
B
A
M
D
F
E
H
K
G
8
The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions.
1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction?
2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe:
a) What molecule do you recommend for the trial. Why?
b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for?
3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale.
4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale.
Mutation 1
Mutation 2
Chapter 18 Solutions
Genetics: Analysis and Principles
Ch. 18.1 - 1. A mutation changes a codon that specifies...Ch. 18.1 - A down promoter mutation causes the promoter of a...Ch. 18.1 - 3. A mutation in one gene that reverses the...Ch. 18.1 - Which of the following is an example of a somatic...Ch. 18.2 - Prob. 1COMQCh. 18.3 - Which of the following is not an example of a...Ch. 18.3 - A point mutation could be caused by a....Ch. 18.3 - One way that TNRE may occur involves the formation...Ch. 18.4 - Nitrous acid replaces amino groups with keto...Ch. 18.4 - Prob. 2COMQ
Ch. 18.4 - Prob. 3COMQCh. 18.5 - The function of photolyase is to repair a....Ch. 18.5 - Which of the following DNA repair systems may...Ch. 18.5 - 3. In nucleotide excision repair in E. coli, the...Ch. 18.5 - Prob. 4COMQCh. 18.5 - An advantage of translesion-replicating...Ch. 18 - Is each of the following mutations a transition,...Ch. 18 - Prob. 2CONQCh. 18 - What does a suppressor mutation suppress? What is...Ch. 18 - Prob. 4CONQCh. 18 - X-rays strike a chromosome in a living cell and...Ch. 18 - Prob. 6CONQCh. 18 - Prob. 7CONQCh. 18 - Prob. 8CONQCh. 18 - Prob. 9CONQCh. 18 - Prob. 10CONQCh. 18 - 11. Is a random mutation more likely to be...Ch. 18 - 12. Which of the following mutations could be...Ch. 18 - Prob. 13CONQCh. 18 - Discuss the consequences of a germ-line versus a...Ch. 18 - Prob. 15CONQCh. 18 - Explain how a mutagen can interfere with DNA...Ch. 18 - What type of mutation (transition, transversion,...Ch. 18 - Explain what happens to the sequence of DNA during...Ch. 18 - Distinguish between spontaneous and induced...Ch. 18 - Prob. 20CONQCh. 18 - Prob. 21CONQCh. 18 - Prob. 22CONQCh. 18 - Trinucleotide repeat expansions (TNREs) are...Ch. 18 - 24. With regard to TNRE, what is meant by the term...Ch. 18 - 25. What is the difference between the mutation...Ch. 18 - Achondroplasia is a rare form of dwarfism. It is...Ch. 18 - Prob. 27CONQCh. 18 - In the treatment of cancer, the basis for many...Ch. 18 - Prob. 29CONQCh. 18 - 30. Which of the following examples is likely to...Ch. 18 - Prob. 31CONQCh. 18 - Prob. 32CONQCh. 18 - Prob. 33CONQCh. 18 - With regard to the repair of double-strand breaks,...Ch. 18 - Prob. 35CONQCh. 18 - Prob. 36CONQCh. 18 - 37. Three common ways to repair changes in DNA...Ch. 18 - Prob. 38CONQCh. 18 - Prob. 39CONQCh. 18 - Explain how the technique of replica plating...Ch. 18 - 2. Outline how you would use the technique of...Ch. 18 - 3. From an experimental point of view, is it...Ch. 18 - Prob. 4EQCh. 18 - Prob. 5EQCh. 18 - 6. Richard Boyce and Paul Howard-Flanders...Ch. 18 - In E. coli, a variety of mutator strains have been...Ch. 18 - 2. Discuss the times in a person’s life when it is...Ch. 18 - A large amount of research is aimed at studying...
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