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Microbiology Objective Questions { Viruses }



1. Which of the following disinfectant is effective against viruses?
A.Hydrogen peroxide
B.Hypochlorite
C.Formaldehyde
D.All of these
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2. Viruses largely lack metabolic machinery of their own to generate energy or to synthesize
A.protein
B.carbohydrate
C.alcohol
D.all of these
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3. Viruses require __________ for growth.
A.bacteria
B.plants
C.animals
D.living cells
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4. Reverse transcriptase is a useful enzyme to have when
A.an RNA virus converts its RNA to DNA
B.there are no host cells present
C.nutrients are scarce
D.spikes are forming in the new virus
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5. The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities
A.among different viruses than between viruses and their hosts
B.among different viral hosts than among different viruses
C.among different viral hosts than between viruses and their hosts
D.between viruses and their hosts than among different viruses
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6. When a virus enters a cell but does not replicate immediately, the situation is called
A.lysogeny
B.fermentation
C.symbiosis
D.synergism
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7. Usually viruses are separated into several large groups based primarily on
A.nature of the host
B.nucleic acid characteristics
C.capsid symmetry
D.diameter of the viroin or nucleocapsid
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