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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Textbook Question
Chapter 27.2, Problem 1MI
What enzyme found in the T4 baseplate facilitates penetration through the cell wall?
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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 27 Solutions
Prescott's Microbiology
Ch. 27.1 - List some characteristics used in classifying...Ch. 27.1 - Consider these terms: Equine torovirus,...Ch. 27.2 - What enzyme found in the T4 baseplate facilitates...Ch. 27.2 - Why do you think T4 evolved to initiate DNA...Ch. 27.2 - What function does HMC glycosylation serve?Ch. 27.2 - How is the envelope of this virus formed? How does...Ch. 27.2 - Explain why the T4 genome is circularly permuted.Ch. 27.2 - Prob. 1.2RIACh. 27.2 - How is a prophage induced to become active again?Ch. 27.2 - Describe the roles of cII, CIII, repressor (CI),...
Ch. 27.2 - How do the temperate phages Mu and P1 differ from...Ch. 27.2 - The CRISPR/Cas system has been a boon to...Ch. 27.2 - Why do cold sores recur throughout the lifetime of...Ch. 27.2 - In what part of the host cell does a herpesvirus...Ch. 27.2 - Many small DNA viruses rely on host enzymes for...Ch. 27.3 - Why is the X174 genome considered plus stranded?Ch. 27.3 - Prob. 2MICh. 27.3 - Why is it necessary for some ssDNA viruses to...Ch. 27.3 - From the point of view of the virus, compare the...Ch. 27.3 - How do parvoviruses trick the host DNA polymerase...Ch. 27.4 - The rotavirus genome encodes 12 proteins. Suggest...Ch. 27.4 - Describe the life cycle of 6 phage. What makes...Ch. 27.4 - Prob. 3RIACh. 27.4 - In what ways are the life cycles of 6 and...Ch. 27.5 - Where in the host does the plus-strand RNA genome...Ch. 27.5 - How do some plus-strand viruses use polyproteins...Ch. 27.5 - What is an IRES? Why is it important?Ch. 27.5 - Prob. 3RIACh. 27.6 - How does that use of a segmented genome by...Ch. 27.6 - Prob. 2RIACh. 27.7 - Prob. 1MICh. 27.7 - Prob. 1RIACh. 27.7 - Prob. 2RIACh. 27.7 - What role does alternative splicing play in the...Ch. 27.8 - Prob. 1RIACh. 27.8 - Trace the HBV multiplication cycle, paying...Ch. 27 - No temperate RNA phages have yet been discovered....Ch. 27 - The choice between lysogeny and lysis is...Ch. 27 - Prob. 3CHICh. 27 - You are studying RNA viruses and have discovered a...Ch. 27 - Prob. 5CHICh. 27 - Upon infection of host epithelial cells,...Ch. 27 - Associated with the envelope of herpesviruses are...
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