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BIOD 171 Module 6 - Practice Self Exam with complete verified solutions.
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BIOD 171 Module 6 - Practice Self Exam with complete verified solutions.
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BIOD 171: Module 6 -Practice Self Exam with
complete verified solutions
True or False: Because the genome is contained within an enclosed space,
(much like the nucleus of the cell) viruses are classified as eukaryotic.
False
(Viruses are neither eukaryotic nor prokaryotic.)
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Describe the two basic components of a virus.
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.
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, The envelope surrounds the ______ of some viruses.
Capsid
True or False: You would expect to see a viral envelope on a virus infecting
a bacterial cell.
False
(The overwhelming majority of animal viruses are enveloped whereas the
majority of plant or bacteria infecting viruses are not.)
Rank the following viruses based on their size from largest to smallest:
A. Paramyxovirus
B. Poliovirus
C. Smallpox virus
1. Smallpox (~200 nm)
2. Paramyxovirus (~100-150 nm)
3. Poliovirus (~30 nm)
Smallpox > Paramyxovirus > Poliovirus
True or False: Viral replication occurs after it attaches and enters the host
cell.
True
(The viral genome is never replicated before attachment and entry.)
Place the following viral life cycle steps in order beginning with viral
attachment and provide a description of each step.
A. Uncoating
B. Release
C. Replication
D. Attachment
E. Entry
F. New infection
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.
3. Uncoating: the viral capsid disassembles.
4. Replication: the viral genome is the ‘blueprint’ to make copies of itself.
5. Release: new virus particles are produced and leave the cell.
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