Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Chapter 36, Problem 1CHI
As more ways of identifying the characteristics of microorganisms emerge, the number of distinguishable microbial strains also seems to increase. Why do you think this is the case?
Expert Solution & Answer
Summary Introduction
To determine: The reason for increase in distinguishable microbial strains with an increase in emergence of more ways of identifying the characteristics of microorganisms.
Introduction: Several methods and techniques of identification have been devised that allow easy, rapid and reliable generation of results. These techniques allow easy and precise identification and differentiation of various microbial species and strains.
Explanation of Solution
The number of distinguishable microbial strains is increasing as more ways to differentiate them through various identification and classification techniques have been developed. The same strains would have been present before but the earlier study methods were restricted and the strains were therefore difficult to differentiate.
Due to advancements in the characterizing strategies it has now become more common practice to discover newer strains in microbial population. Better microscopes and various culture methods have made it easier to analyze the microbial cell membrane and to study growth patterns respectively. Improvement in study methods has made identification of microbial features possible.
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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 36 Solutions
Prescott's Microbiology
Ch. 36.3 - You have detected aerobic, Gram-positive cocci...Ch. 36.3 - Prob. 2MICh. 36.3 - Prob. 1RIACh. 36.3 - Describe in general how biochemical tests are used...Ch. 36.3 - Prob. 3RIACh. 36.3 - Prob. 4RIACh. 36.3 - Describe a dichotomous key that could be used to...Ch. 36.3 - How can nucleic acidbased detection methods be...Ch. 36.3 - How can a suspect bacterium be fingerprinted?Ch. 36.4 - Prob. 1MI
Ch. 36.4 - Figure 36.10 Agglutination Tests. (a) Tube...Ch. 36.4 - Prob. 3MICh. 36.4 - Prob. 4MICh. 36.4 - Prob. 1RIACh. 36.4 - Prob. 2RIACh. 36.4 - Prob. 3RIACh. 36.4 - Prob. 4RIACh. 36.4 - Prob. 5RIACh. 36.4 - Name two types of immunodiffusion tests and...Ch. 36.4 - Prob. 7RIACh. 36.4 - Prob. 8RIACh. 36.4 - Prob. 9RIACh. 36 - As more ways of identifying the characteristics of...Ch. 36 - Prob. 2CHICh. 36 - ELISA tests usually use a primary and secondary...Ch. 36 - Legionella pneumophila is a bacterium that is...Ch. 36 - Prob. 5CHI
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