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1 | |
A virus is a tiny infectious |
| | A) | cell |
| | B) | living thing |
| | C) | particle |
| | D) | nucleic acid |
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2 | |
Viruses are known to infect |
| | A) | plants |
| | B) | bacteria |
| | C) | fungi |
| | D) | all organisms |
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3 | |
The capsid is composed of protein subunits called |
| | A) | spikes |
| | B) | protomers |
| | C) | virions |
| | D) | capsomers |
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4 | |
The envelope of an animal virus is derived from the ______ of its host cell. |
| | A) | cell wall |
| | B) | cell membrane |
| | C) | glycocalyx |
| | D) | receptors |
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5 | |
The nucleic acid of a virus is |
| | A) | DNA only |
| | B) | RNA only |
| | C) | both DNA and RNA |
| | D) | either DNA or RNA |
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6 | |
The general steps in a viral multiplication cycle are |
| | A) | adsorption, penetration, replication, maturation, and release |
| | B) | endocytosis, uncoating, replication, assembly, budding |
| | C) | adsorption, uncoating, duplication, assembly, and lysis |
| | D) | endocytosis, penetration, replication, maturation, and exocytosis |
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7 | |
A prophage is an early stage in the development of a/an |
| | A) | bacterial virus |
| | B) | poxvirus |
| | C) | lytic virus |
| | D) | enveloped virus |
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8 | |
The nucleic acid of animal viruses enters the host cell through |
| | A) | translocation |
| | B) | fusion |
| | C) | endocytosis |
| | D) | all of these |
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9 | |
In general, RNA viruses multiply in the cell ______, and DNA viruses multiply in the cell ______. |
| | A) | nucleus, cytoplasm |
| | B) | cytoplasm, nucleus |
| | C) | vesicles, ribosomes |
| | D) | endoplasmic reticulum, nucleolus |
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10 | |
Enveloped viruses carry surface receptors called |
| | A) | buds |
| | B) | spikes |
| | C) | fibers |
| | D) | sheaths |
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11 | |
Viruses that persist in the cell and cause recurrent disease are considered |
| | A) | oncogenic |
| | B) | cytopathic |
| | C) | latent |
| | D) | resistant |
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12 | |
Examples of cytopathic effects of viruses are |
| | A) | inclusion bodies |
| | B) | giant cells |
| | C) | multiple nuclei |
| | D) | all of these |
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13 | |
Viruses cannot be cultivated in: |
| | A) | tissue culture |
| | B) | bird embryos |
| | C) | live mammals |
| | D) | blood agar |
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14 | |
Clear patches in cell cultures that indicate sites of virus infection are called |
| | A) | plaques |
| | B) | pocks |
| | C) | colonies |
| | D) | prions |
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2002 McGraw-Hill Higher Education