Portage Microbiology Exam #6 Questions
With Correct Answers
True or False: Because the genome is contained within an enclosed
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space, (much like the nucleus of a cell) viruses are classified as
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eukaryotic - CORRECT ANSWER✔✔-False. Viruses are neither eukaryotic
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nor prokaryotic
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Describe the two basic components of a virus (short answer) - CORRECT
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ANSWER✔✔-A virus has 1. genomic material comprised of either DNA
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or RNA and 2. a capsid, a membrane-like protective structure that
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contains the genetic material, similar to the nucleus of a eukaryotic cell
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The _____ surrounds the capsid of some viruses - CORRECT
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ANSWER✔✔-Envelope
The envelope surrounds the _____ of some viruses - CORRECT
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ANSWER✔✔-Capsid
True or False: You would expect to see a viral envelope on a virus
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infecting a plant cell - CORRECT ANSWER✔✔-False. The overwhelming
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majority of animal viruses are enveloped whereas the majority of plant
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or bacteria-infecting viruses are not
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, True or False: You would expect to see a viral envelope on a virus
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infecting a bacterial cell - CORRECT ANSWER✔✔-False: Not all the
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viruses have envelopes
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Rank the following viruses based on their size from largest to smallest:
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orthomyxovirus, poliovirus, variolavirus - CORRECT ANSWER✔✔- | | | | |
Variolavirus>Orthomyxovirus>Poliovirus
Rank the following viruses based on their size from largest to
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smallest:Paramyxovirus, Poliovirus, Smallpox virus - CORRECT | | | | | |
ANSWER✔✔-Smallpox>Paramyxovirus>Poliovirus
True or False: Viral replication occurs after it attaches and enters the
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host cell - CORRECT ANSWER✔✔-True. The viral genome is never
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replicated before attachment and entry | | | |
True or False: Highly infectious viruses undergo genome replication prior
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|to viral attachment and entry. - CORRECT ANSWER✔✔-False. The viral
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genome is never replicated before attachment and entry regardless of
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its level of infectivity.
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Place the following viral life cycle steps in order beginning with viral
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attachment and provide a description of each step (short answer) -
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CORRECT ANSWER✔✔-Uncoating: the viral capsid disassembles
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With Correct Answers
True or False: Because the genome is contained within an enclosed
| | | | | | | | | | |
space, (much like the nucleus of a cell) viruses are classified as
| | | | | | | | | | | |
eukaryotic - CORRECT ANSWER✔✔-False. Viruses are neither eukaryotic
| | | | | | |
nor prokaryotic
| |
Describe the two basic components of a virus (short answer) - CORRECT
| | | | | | | | | | | |
ANSWER✔✔-A virus has 1. genomic material comprised of either DNA
| | | | | | | | | |
or RNA and 2. a capsid, a membrane-like protective structure that
| | | | | | | | | | |
contains the genetic material, similar to the nucleus of a eukaryotic cell
| | | | | | | | | | |
The _____ surrounds the capsid of some viruses - CORRECT
| | | | | | | | | |
ANSWER✔✔-Envelope
The envelope surrounds the _____ of some viruses - CORRECT
| | | | | | | | | |
ANSWER✔✔-Capsid
True or False: You would expect to see a viral envelope on a virus
| | | | | | | | | | | | | |
infecting a plant cell - CORRECT ANSWER✔✔-False. The overwhelming
| | | | | | | | |
majority of animal viruses are enveloped whereas the majority of plant
| | | | | | | | | | |
or bacteria-infecting viruses are not
| | | |
, True or False: You would expect to see a viral envelope on a virus
| | | | | | | | | | | | | |
infecting a bacterial cell - CORRECT ANSWER✔✔-False: Not all the
| | | | | | | | | |
viruses have envelopes
| |
Rank the following viruses based on their size from largest to smallest:
| | | | | | | | | | | |
orthomyxovirus, poliovirus, variolavirus - CORRECT ANSWER✔✔- | | | | |
Variolavirus>Orthomyxovirus>Poliovirus
Rank the following viruses based on their size from largest to
| | | | | | | | | | |
smallest:Paramyxovirus, Poliovirus, Smallpox virus - CORRECT | | | | | |
ANSWER✔✔-Smallpox>Paramyxovirus>Poliovirus
True or False: Viral replication occurs after it attaches and enters the
| | | | | | | | | | | |
host cell - CORRECT ANSWER✔✔-True. The viral genome is never
| | | | | | | | | |
replicated before attachment and entry | | | |
True or False: Highly infectious viruses undergo genome replication prior
| | | | | | | | |
|to viral attachment and entry. - CORRECT ANSWER✔✔-False. The viral
| | | | | | | | | |
genome is never replicated before attachment and entry regardless of
| | | | | | | | | |
its level of infectivity.
| | |
Place the following viral life cycle steps in order beginning with viral
| | | | | | | | | | | |
attachment and provide a description of each step (short answer) -
| | | | | | | | | | |
CORRECT ANSWER✔✔-Uncoating: the viral capsid disassembles
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