Campbell Biology: Custom Edition
Campbell Biology: Custom Edition
18th Edition
ISBN: 9781323717271
Author: Urry, Cain, Wasserman, Minorsky, Reece
Publisher: PEARSON C
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Chapter 19, Problem 5TYU
Summary Introduction

Introduction: Viruses are infectious acellular microorganisms that have the key components such as nucleic acids, DNA, or RNA. RNA viruses are intracellular parasites having RNA in their genome. RNA virus has its own set of enzymes required for the replication process within the host cells.

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Which of the following processes occurs in both lytic and nonlytic viral infections?(i) Infected cell ruptures to release viral particles.(ii) Viral mRNAs are transcribed by the host-cell translation machinery.(iii) Viral proteins and nucleic acids are packaged to produce virions.
Which statement is true of viral replication?  A)  virus attaches to a specific receptor site on the host-cell membrane.   B)  Once inside the cell, the viral capsid is degraded, and the viral nucleic acid is released.  C)   Virus uses the host cell’s machinery to replicate and new virus particles are released.  D)      All of the above
The second step in viral replication is entry. For bacteriophage, entry usually involves: O a) direct entry of the nucleic acid into the cell. Ob) phagocytosis. c) membrane fusion mechanism of entry. d) receptor-mediated endocytosis.
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