Multiple Choice
Emerging viruses that infect human cells can originate from which of the following sources?
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1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
Back1. Introduction to Microbiology
Acellular Infectious Agents: Viruses, Viroids & Prions
- Multiple ChoiceWhich of the following is the most common means of virus distribution?29views
- Multiple ChoiceBacteriophages and animal viruses do not differ significantly in which one of the following steps of their replication cycles?62views
- Multiple ChoiceWhich of the following is NOT used as a criterion to classify viruses?47views
- Multiple ChoiceAll viruses are made up of two essential components. These components are:41views
- Multiple ChoiceWhich statement best explains why viruses are considered non-living entities?50views
- Multiple Choice
Viruses:
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This type of acellular infectious agent is only known to infect plants and is a small, circular, single-stranded nucleic acid molecule.
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An infectious protein is known to cause neurodegenerative diseases in humans such as Creutzfeldt-Jakob disease ('mad cow disease'). This type of acellular infectious agent is known as a _________.
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Which of the following statements about acellular infectious agents is FALSE?
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All of the following can be transmitted by recreational (i.e., swimming) water sources except
a. Amebic dysentery.
b. Cholera.
c. Giardiasis.
d. Hepatitis B.
e. Salmonellosis.
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Which of the following is not an acellular agent?
a. Viroid
b. Virus
c. Rickettsia
d. Prion
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Which of the following statements is true?
a. Viruses move toward their host cells.
b. Viruses are capable of metabolism.
c. Viruses lack a cytoplasmic membrane.
d. Viruses grow in response to their environmental conditions.
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A virus that is specific for a bacterial host is called a __________ .
a. Phage
b. Prion
c. Virion
d. Viroid
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A naked virus __________ .
a. Lacks a membranous envelope
b. Has injected its DNA or RNA into a host cell
c. Is devoid of capsomeres
d. Is one that is unattached to a host cell
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