Ques 2 / 2 pts tion 1
True or False. Although viruses may contain their genome within an
enclosed space (much like the nucleus of a cell), it is
... [Show More] considered neither
eukaryotic nor prokaryotic.
True Correct!
False
Ques 5 / 5 pts tion 2
Your Answer:
Describe the two basic components of a virus.
Two basic components of a virus are;
BIOD
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The genomic material that comprises of either DNA or RNA
A capsid, a membraneus like protective structure that contains genetic
materials similar to those of the eukaryotic cell
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.
Ques 3 / 3 pts tion 3
Your Answer:
The envelope surrounds the _________ of some viruses.
Capsid
capsid
Ques 2 / 2 pts tion 4
True or False. You would expect to see a viral envelope on a virus
infecting a bacterial cell.
True False Correct!
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False. The overwhelming majority of animal viruses are enveloped
whereas the majority of plant or bacteria-infecting viruses are not.
Ques 3 / 3 pts tion 5
Your Answer:
Rank the following viruses based on their size from largest to smallest:
Paramyxovirus
Poliovirus
Smallpox virus
Smallpox virus(~200nm) ---> Paramyxovirus(100-150nm) --->
Poliovirus(~30nm)
Smallpox (~200nm) > Paramyxovirus (100-150nm) >
Poliovirus (~30nm)
Ques 2 / 2 pts tion 6
True or False: Viral replication occurs after it attaches and enters the host
cell.
True Correct!
True. The viral genome is never replicated before attachment and
entry.
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False
Ques 5 / 5 pts tion 7
Your Answer:
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:
Attachment --> Entry --> Uncoating --> Replication --> Release --> New
Infection
Attachment; the viral receptors attaches to te host protein on the cell
surface
Entry; the virus fuses with the membrane of the host cells and enters
the cell
Uncoating; The viral capsid disassembles
Replication; the viral genome is the blue print that replicates itself
Release; New viral particles are produced and then released
New Infection; the released new viral particles that exists the cell go
ahead and infect new cells
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3- Uncoating: the viral capsid disassembles
5-Release: New virus particles are produced and leave the cell
4-Replication: the viral genome is the ‘blueprint’ to make
copies of itself
1-Attachment: viral receptors bind to host proteins on the
surface of the cell
2-Entry: the virus fuses with the host membrane and enters
the cell
6-New infection: newly produced viruses that left the host cell
now go on to infect new cells.
Ques 3 / 3 pts tion 8
Your Answer:
A virus that infects bacteria is called a [answer1] and contains a [answer2]
-sided polygon capsid.
Bacteriophage; 20
1. Bacteriophage
2. 20
Ques 2 / 2 pts tion 9
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True or False. Structurally, bacteriophages are distinct from viruses that
infect plant or animal cells.
True Correct!
True. Bacteriophages are structurally distinct from viruses that infect
plant and animals cells.
False
Ques 5 / 5 pts tion 10
Identify the following components of a bacteriophage.
1-[answer1]
2- [answer2]
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Your Answer:
3- [answer3]
4- [answer4]
5- [answer5]
1. Capsid
2. Collar
3. Tail
4. Base Plate
5. Tail fibre
1-Capsid
2- Collar
3- Tail
4- Base plate
5- Tail fibers [Show Less]