Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 21, Problem 12RQ
Summary Introduction
To review:
The role of
Introduction:
Anaerobic microbes do not require oxygen to grow. In the presence of oxygen, they can react negatively or can die. There are three types of anaerobic organisms. Facultative anaerobes can grow in the presence or absence of oxygen, aerotolerant anaerobes do not require oxygen to grow, and strict anaerobes never utilize oxygen for growth and metabolism.
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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 21 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 21.1 - Prob. 1TQCh. 21.1 - Prob. 2TQCh. 21.1 - Prob. 3TQCh. 21.2 - Prob. 1TQCh. 21.4 - Prob. 1TQCh. 21.4 - Prob. 2TQCh. 21.4 - Prob. 3TQCh. 21.5 - Prob. 1TQCh. 21.6 - Prob. 1TQCh. 21.6 - Prob. 2TQ
Ch. 21.6 - Prob. 3TQCh. 21.6 - Prob. 4TQCh. 21 - Prob. 1RQCh. 21 - Prob. 2RQCh. 21 - Prob. 3RQCh. 21 - Prob. 4RQCh. 21 - Prob. 5RQCh. 21 - Prob. 6RQCh. 21 - Prob. 7RQCh. 21 - Prob. 8RQCh. 21 - Prob. 9RQCh. 21 - Prob. 10RQCh. 21 - Prob. 11RQCh. 21 - Prob. 12RQCh. 21 - Prob. 13RQCh. 21 - Prob. 14RQCh. 21 - Prob. 1TQCh. 21 - Prob. 2TQCh. 21 - Prob. 3TQ
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