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Viruses

Viruses
Virus reproduces in living cells by

duplication
replication
multiplication
all of these

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Viruses
The first step in infection of a host bacterial cells by a phage is

absorption
adsorption
replication
penetration

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Viruses
Viruses can be purified based on their size and density by using

none of these
precipitation
gradient centrifugation
differential centrifugation

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Viruses
Which of the following may affect proteins and nucleic acids, but not viruses?

All of these
Pressure
Denaturation
Enzyme treatment

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Viruses
In cell culture, measles virus may lead to

transformation of cells
nuclear pyknosis
syncytium formation
rounding and aggregation of cells

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Viruses
Enzyme neuraminidase is carried by which of the following viruses?

Human immunodeficiency virus
Influenza virus
Adenovirus
Epstein-Barr virus

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