BIOD 171 Exam 6 Questions with Correct
Answers
True or False . Although viruses may contain their genome within an enclosed space (
much like the nucleus of a cell ) , it is considered neither eukaryotic nor prokaryotic .
True
Describe the two basic components of a virus .
A has virus ( 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 .
True or False . Because the genome is contained within an enclosed space ( much like
the nucleus of a cell ) , viruses classified as eukaryotic .
False
The envelope surrounds the ________ of some viruses .
capsid
True or False . You would expect to see a viral envelope on a virus infecting a plant cell .
False
The __________ surrounds the capsid of some viruses .
envelope
Rank the following viruses based on their size from largest to smallest :
Orthomyxovirus, Poliovirus, Variolavirus
Variolavirus, Orthomyxovirus, Poliovirus
True or False : Highly infectious viruses undergo genome replication prior to viral
attachment and entry .
False
True or False : Viral replication occurs after it attaches and enters the host cell .
, True
Place the following viral life cycle steps in order beginning with viral attachment and
provide a description of each step . Uncoating : Release : Replication : Attachment :
Entry : New infection :
1. viral attachment : viral receptors bind to the host proteins on surface of cell 2. entry : the
virus fuses with host membrane 3. uncoating : the viral capsid disassembles 4. replication :
viral genome makes copies of itself 5. release : new virus particles are produced and leave the
cell 6. new infection : newly produced viruses leave the host cell and infect new cells
A virus that infects bacteria is called a [ answer1 ] and contains a [ answer2 ] -sided
polygon capsid .
1. Bacteriophage 2. 20
True or False . Structurally , bacteriophages are similar to viruses that infect
ANIMALS .
False
True or False . Structurally , bacteriophages are distinct from viruses that infect plant
or animal cells .
True
Describe the main differences between lytic and temperate phages .
Lytic bacteriophages replicate within the host bacteria cell until it reputures
Temporate phages exist in a non - replicative state that does not kill host cell
Which of the following can be spread via airborne particles :
All of the above
True or False . A patient infected with rubella is considered infectious one week before
and after the appearance of the trademark rash .
True
Answers
True or False . Although viruses may contain their genome within an enclosed space (
much like the nucleus of a cell ) , it is considered neither eukaryotic nor prokaryotic .
True
Describe the two basic components of a virus .
A has virus ( 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 .
True or False . Because the genome is contained within an enclosed space ( much like
the nucleus of a cell ) , viruses classified as eukaryotic .
False
The envelope surrounds the ________ of some viruses .
capsid
True or False . You would expect to see a viral envelope on a virus infecting a plant cell .
False
The __________ surrounds the capsid of some viruses .
envelope
Rank the following viruses based on their size from largest to smallest :
Orthomyxovirus, Poliovirus, Variolavirus
Variolavirus, Orthomyxovirus, Poliovirus
True or False : Highly infectious viruses undergo genome replication prior to viral
attachment and entry .
False
True or False : Viral replication occurs after it attaches and enters the host cell .
, True
Place the following viral life cycle steps in order beginning with viral attachment and
provide a description of each step . Uncoating : Release : Replication : Attachment :
Entry : New infection :
1. viral attachment : viral receptors bind to the host proteins on surface of cell 2. entry : the
virus fuses with host membrane 3. uncoating : the viral capsid disassembles 4. replication :
viral genome makes copies of itself 5. release : new virus particles are produced and leave the
cell 6. new infection : newly produced viruses leave the host cell and infect new cells
A virus that infects bacteria is called a [ answer1 ] and contains a [ answer2 ] -sided
polygon capsid .
1. Bacteriophage 2. 20
True or False . Structurally , bacteriophages are similar to viruses that infect
ANIMALS .
False
True or False . Structurally , bacteriophages are distinct from viruses that infect plant
or animal cells .
True
Describe the main differences between lytic and temperate phages .
Lytic bacteriophages replicate within the host bacteria cell until it reputures
Temporate phages exist in a non - replicative state that does not kill host cell
Which of the following can be spread via airborne particles :
All of the above
True or False . A patient infected with rubella is considered infectious one week before
and after the appearance of the trademark rash .
True
