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Viruses

Viruses
Enveloped viruses have a __________ shape.

helical
roughly spherical
icosahedral
complex

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Viruses
The temperate phage possesses a gene that codes for a repressor protein which makes the cell resistant to lysis initiated by

none of these
the prophage
lytic infection by other viruses
Both (a) and (b)

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Viruses
Which one is not useful in the treatment of viruses except

penicillin
acyclovir
interferon
antibodies

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Viruses
A change from lysogeny to lysis is generally induced by

irradiation
all of these
ultraviolet light
chemicals

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Viruses
Inclusion bodies of measles virus are

both (a) and (b)
intracytoplasmic
intranuclear
none of these

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Viruses
The phage components begin to assemble into mature phages only after the synthesis of

amino acids
structural protein
nucleic acid
Both (a) and (b)

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