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Viruses

Viruses
Which of the following virus is enveloped?

Adeno
Herpes
None of these
Polio

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Viruses
Which of the following viruses has not been associated with human cancer?

Hepatitis B virus
Herpes simplex virus type 2
Hepatitis C virus
Varicella-Zoster virus

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Viruses
The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as

C
A
D
B

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Viruses
Lysozyme (an endolysin) which will lyse the bacterial cell, releasing the mature virions is present in

immediate early phage genes
late genes
all of these
delayed early genes

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Viruses
The infected cells continue to reproduce themselves as well as the virus, and the mature virions are extruded from the cell surface continuously over a long period of time. This type of release mechanism is called a

productive infection
resultant infection
inductive infection
all of these

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

gradient centrifugation
precipitation
none of these
differential centrifugation

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