Microbiology: An Introduction (13th Edition)
13th Edition
ISBN: 9780134605180
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case, Derek Weber, Warner Bair
Publisher: PEARSON
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Chapter 13, Problem 6MCQ
The ability of a virus to infect an organism is regulated by
- a. the host species.
- b. the type of cells.
- c. the availability of an attachment site.
- d. cell factors necessary for viral replication.
- e. ail of the above
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To infect their specific host cells, viruses go through these chronological steps EXCEPT
a.
Release of progeny viruses
b.
Absorption and penetration of the viral particles
c.
Uncoating of the nucleic acid of the viral particles
d.
Synthesis and assembly of viral particle components
Symptoms of viral infections are caused by:
(choose all that apply)
A. Actions of the virus that result in cell damage or death
B. Actions of the immune system that result in cell damage or death
C. Changes in a cell's genetics that result in cancer
(i) Describe each way viruses may be classified. And Define each of the following parts of a virus, their composition/structure, and explain their role in the viral life cycle:
a. Capsid
b. Capsomere
c. Nucleocapsid
d. Envelope
e. Spikes
Chapter 13 Solutions
Microbiology: An Introduction (13th Edition)
Ch. 13 - Why do we classify viruses as obligatory...Ch. 13 - List the four properties that define a virus, what...Ch. 13 - Describe the four morphological classes of...Ch. 13 - Prob. 4RCh. 13 - Compare biosynthesis of a + stranded RNA and a ...Ch. 13 - Prob. 6RCh. 13 - Why is it difficult to determine the etiology of a...Ch. 13 - Prob. 8RCh. 13 - Plant viruses can be cultured in (c) __________.Ch. 13 - NAME IT Identify the viral family that infects...
Ch. 13 - Prob. 1MCQCh. 13 - The molecule serving as mRNA can be incorporated...Ch. 13 - Prob. 3MCQCh. 13 - Prob. 4MCQCh. 13 - An example of lysogeny in animals could be a. slow...Ch. 13 - The ability of a virus to infect an organism is...Ch. 13 - Which of the following statements is false? a....Ch. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - Prob. 10MCQCh. 13 - Discuss the arguments for and against the...Ch. 13 - In some viruses, capsomeres function as enzymes as...Ch. 13 - Why was the discovery of simian AIDS and feline...Ch. 13 - Prophages and proviruses have been described as...Ch. 13 - Prob. 1CAECh. 13 - A newborn female developed extensive vesicular and...Ch. 13 - Prob. 3CAE
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- During viral infection, attachment is usually specific to a particular celltype becausea. the virus is attracted to the appropriate host cells by proteinssecreted into the extracellular fluid.b. the virus recognizes and binds to specific molecules in thecytoplasm of the host cell.c. the virus recognizes and binds to specific molecules on the surfaceof the host cell.d. the host cell produces channel proteins that provide passageways forviruses to enter the cytoplasm.e. the virus releases specific proteins that make holes in the membranelarge enough for the virus to enter.arrow_forwardFind the wrong information about virus attachment and absorption to host cell. A. The surface capsid proteins of naked viruses bind to a specific cell receptor on host cell. B. For enveloped viruses, the spikes are responsible for binding to a specific cell receptor. C. A cell lacking a receptor for a specific virus is not infected by that virus. D. Animal viruses, such as HIV are highly specific and they can only infect particular cell types. E. All of these are true.arrow_forwardClear patches in cell cultures that indicate sites of virus infection are called a. plaques. b. pocks.c. colonies d. prions.arrow_forward
- The host protiens specific for individual virus classes are: a. Docking proteins b. DNA polymerases c. Proteases d. RNasesarrow_forwardWhich of the following statements are correct for RNA viruses? Mark all that apply. A.Replication requires reverse transcriptase B. Uncoating must occur for the virus to be replicated C.The genome consists of two identical strands of ssRNA D.Replication requires RNA dependent RNA polymerase E. The viral DNA acts as a template for production of viral proteins F.Protease enzyme is required for biosynthesis and maturation of virions G. A provirus stage occurs during viral replicationarrow_forwardprophage is a stage in the development of a/ana. bacterial virus. b. poxvirus.c. lytic virusd. enveloped virusarrow_forward
- The envelope of enveloped -viruses : a. Determines the viral morphology b. Both choices are false c . Protects the viral genome d. Both choices are correctarrow_forwardWhy are vaccines and/or passive immunization the method of choice in the treatment or prevention of viral infections? A. There are no known inhibitors to reverse transcription B. Viruses are non-living and do not have their own genetic mechanisms to reproduce by themselves hence host cells must rely on targeting the virus or their products. C. Antibodies prevent replication of viral genome D. Antibodies prevent transcription and translation of viral genomes E. All of thesearrow_forwardWe are confronted with a new RNA virus that uses x-proteins to attach to host cells and primarily infects liver cells. Based on this we would expect: (2 answers only) a. possible latent infections b. viral susceptibility to valacyclovir c. viral suspeptibility to RNA->RNA pol inhibitor d. symptoms of hepatitsarrow_forward
- A positive-strand RNA virus: a.must first be converted to a mRNA before viralproteins can be translated b.is not recognized by host ribosomes. c.can directly translate viral proteins. d.will be degraded by host enzymes. e.needs RNA dependent RNA polymerase to get converted into mRNAarrow_forwardWhich of the following statements seemingly refute the fact that viruses are nonliving? A.They reproduce themselves only inside a host cell. B. They contain no enzymes. C. They can change over time, with the emergence of new strains. D. They cause diseases similar to those caused by bacteria. E. They are composed of protein and nucleic acid.arrow_forwardThink about the cells that viruses infect. Pick out the correct statements below. A. The host cell has some particular thing - be it machinery, chemistry or whatever - that the virus MUST have in order to successfully reproduce. B. Viruse generally don't care what cells they infect. C. Viruses can only replicate in particular hosts and tissues. D. The host range or tissue specficity means the specific type of cells the virus infects. Example - rabies infects neural cells.arrow_forward
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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY