Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Question
Chapter 8.5, Problem 2MQ
Summary Introduction
The virus replication can occur either as lytic or lysogenic pathway. In lytic cycle, the host cell membrane gets destructed after the formation of new virus. The lytic virus replication is best studied in T4 bacteriophage. This virus infects the host cell by attachment and then it makes a hole in the host cell membrane to insert the genetic material into the host cell.
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How is host cell lysis triggered after bacteriophage invasion? What are the outcomes to bacterial host physiology if the bacteriophage undergoes the lysogenic cycle?
Bacteriophage T4 lacks its own RNA polymerase.How do T4 genes get expressed or converted to mRNA?What host barriers must be broken before release ofvirions from the host cell?
What is the difference between the lytic and lysogenic cycle of bacteriophages?
In the lysogenic cycle, the phage DNA integrates itself into the host genome after penetration, and continues to biosynthesis when conditions change
The host cell is not killed in the lysogenic cycle
The lytic cycle occurs in the nucleus, while the lysogenic cycle occurs in the cytoplasm
In the lysogenic cycle, penetration is achieved through phagocytosis
Chapter 8 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 8.1 - How does a virus differ from a cell?Ch. 8.1 - Why does a virus need a host cell?Ch. 8.1 - Compared with cells, what is unusual about viral...Ch. 8.1 - Once inside a host prokaryotic cell, what are the...Ch. 8.2 - Distinguish between a capsid and a capsomere. What...Ch. 8.2 - What is the difference between a naked virus and...Ch. 8.2 - What kinds of enzymes can be found within the...Ch. 8.2 - Where does the envelope surrounding animal viruses...Ch. 8.3 - What is packaged into capsids during maturation?Ch. 8.3 - Explain the term burst size.
Ch. 8.3 - Prob. 3MQCh. 8.3 - Why does a one-step growth curve differ in shape...Ch. 8.4 - What is meant by a viral titer?Ch. 8.4 - What is a plaque-forming unit?Ch. 8.4 - What is meant by the term plating efficiency?Ch. 8.4 - Describe the events that occur on an agar plate...Ch. 8.5 - How does attachment contribute to virushost...Ch. 8.5 - Prob. 2MQCh. 8.5 - Prob. 3MQCh. 8.5 - What is required for a bacteriophage T4 virion to...Ch. 8.6 - Prob. 1MQCh. 8.6 - Give one example each of T4 early, middle, and...Ch. 8.6 - What is required to package the T4 genome into its...Ch. 8.6 - Bacteriophage T4 lacks its own RNA polymerase. How...Ch. 8.7 - What is a lysogen and what is a prophage?Ch. 8.7 - How does DNA replication in lambda differ from...Ch. 8.7 - What commits lambda to the lytic versus the...Ch. 8.7 - What enzyme is required to form a prophage, and...Ch. 8.8 - Prob. 1MQCh. 8.8 - What is the difference between a persistent and a...Ch. 8.8 - Prob. 3MQCh. 8.8 - Why can it be said that the retrovirus genome is...Ch. 8 - What causes the viral plaques that appear on a...Ch. 8 - The promoters on genes encoding early proteins in...Ch. 8 - Under some conditions, it is possible to obtain...
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- if our immume systems are capable of attacking the trypanosome, why do you think we might see the number of parsites in a untreated person's blood repeatedly rebound in that way?arrow_forwardWhy must the top agar be supplemented with MgSo4 A) it is required to induce the production of cro repressors B) it is required to induce the production of cI repressors C) it helps stabilize the phage for infection D) it induces the expression of the lamB gene in E. Coliarrow_forwardWhat advantages might a phage gain by being capable of lysogeny?arrow_forward
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