PORTAGE LEARNING BIOD 171 EXAM
ANSWERS|LATEST !!!!2026|GRADED A+| (EXAM
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 . -
ANSWER True
Describe the two basic components of a virus . - ANSWER 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 . - ANSWER False
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 __________ surrounds the capsid of some viruses . - ANSWER envelope
Rank the following viruses based on their size from largest to smallest : Orthomyxovirus,
Poliovirus, Variolavirus - ANSWER Variolavirus, Orthomyxovirus, Poliovirus
True or False : Highly infectious viruses undergo genome replication prior to viral attachment
and entry . - ANSWER False
1
, True or False : Viral replication occurs after it attaches and enters the host cell . -
ANSWER 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 : - ANSWER 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 . - ANSWER 1. Bacteriophage 2. 20
True or False . Structurally , bacteriophages are similar to viruses that infect ANIMALS . -
ANSWER False
True or False . Structurally , bacteriophages are distinct from viruses that infect plant or
animal cells . - ANSWER True
Describe the main differences between lytic and temperate phages . - ANSWER 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 : - ANSWER 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 . - ANSWER True
2
ANSWERS|LATEST !!!!2026|GRADED A+| (EXAM
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 . -
ANSWER True
Describe the two basic components of a virus . - ANSWER 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 . - ANSWER False
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 __________ surrounds the capsid of some viruses . - ANSWER envelope
Rank the following viruses based on their size from largest to smallest : Orthomyxovirus,
Poliovirus, Variolavirus - ANSWER Variolavirus, Orthomyxovirus, Poliovirus
True or False : Highly infectious viruses undergo genome replication prior to viral attachment
and entry . - ANSWER False
1
, True or False : Viral replication occurs after it attaches and enters the host cell . -
ANSWER 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 : - ANSWER 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 . - ANSWER 1. Bacteriophage 2. 20
True or False . Structurally , bacteriophages are similar to viruses that infect ANIMALS . -
ANSWER False
True or False . Structurally , bacteriophages are distinct from viruses that infect plant or
animal cells . - ANSWER True
Describe the main differences between lytic and temperate phages . - ANSWER 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 : - ANSWER 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 . - ANSWER True
2
