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Viruses

Viruses
The bacterial viruses having head made up of large capsomeres, but no tail is morphologically classified as

A
B
D
C

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Viruses
A change from lysogeny to lysis is generally induced by

ultraviolet light
chemicals
all of these
irradiation

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

gradient centrifugation
differential centrifugation
precipitation
none of these

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Viruses
The most popular indirect method of counting virus particles is by

hemagglutination assay
counting plaque-forming units
plaque-assay
colony counting

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Viruses
The extracellular phage number increases until a constant titer at the end of the multiplication cycle. This time interval is termed as

eclipse period
latent period
burst size
rise period

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

Enzyme treatment
All of these
Pressure
Denaturation

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