BIOD 171 Essential
Microbiology Portage Learning
Module 6 QUESTIONS AND
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 - ANSWER-False.
Viruses are neither eukaryotic nor prokaryotic
Describe the two basic components of a virus (short ANSWER) - 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 - ANSWER-Envelope
The envelope surrounds the _____ of some viruses - ANSWER-Capsid
True or False: You would expect to see a viral envelope on a virus infecting a plant
cell - 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 - ANSWER-False: Not all the viruses have envelopes
Rank the following viruses based on their size from largest to smallest:
orthomyxovirus, poliovirus, variolavirus - ANSWER-
Variolavirus>Orthomyxovirus>Poliovirus
Rank the following viruses based on their size from largest to
smallest:Paramyxovirus, Poliovirus, Smallpox virus - ANSWER-
Smallpox>Paramyxovirus>Poliovirus
True or False: Viral replication occurs after it attaches and enters the host cell -
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. - 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) - ANSWER-Uncoating: the
viral capsid disassembles
Release: New virus particles are produced and leave the cell
Replication: the viral genome is the 'blueprint' to make copies of itself
Attachment: viral receptors bind to host proteins on the surface of the cell
Entry: the virus fuses with the host membrane and enters the cell
Microbiology Portage Learning
Module 6 QUESTIONS AND
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 - ANSWER-False.
Viruses are neither eukaryotic nor prokaryotic
Describe the two basic components of a virus (short ANSWER) - 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 - ANSWER-Envelope
The envelope surrounds the _____ of some viruses - ANSWER-Capsid
True or False: You would expect to see a viral envelope on a virus infecting a plant
cell - 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 - ANSWER-False: Not all the viruses have envelopes
Rank the following viruses based on their size from largest to smallest:
orthomyxovirus, poliovirus, variolavirus - ANSWER-
Variolavirus>Orthomyxovirus>Poliovirus
Rank the following viruses based on their size from largest to
smallest:Paramyxovirus, Poliovirus, Smallpox virus - ANSWER-
Smallpox>Paramyxovirus>Poliovirus
True or False: Viral replication occurs after it attaches and enters the host cell -
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. - 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) - ANSWER-Uncoating: the
viral capsid disassembles
Release: New virus particles are produced and leave the cell
Replication: the viral genome is the 'blueprint' to make copies of itself
Attachment: viral receptors bind to host proteins on the surface of the cell
Entry: the virus fuses with the host membrane and enters the cell
