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Viruses

Viruses
Enveloped viruses have a __________ shape.

roughly spherical
icosahedral
complex
helical

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Viruses
Group E phages have

double stranded DNA
double stranded DNA
single stranded RNA
single stranded DNA

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

absorption
adsorption
penetration
replication

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Viruses
Virus reproduces in living cells by

duplication
all of these
replication
multiplication

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Viruses
The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed as

immunity repressor
immunity operon
none of these
operon repressor

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

acyclovir
interferon
penicillin
antibodies

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