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Viruses

Viruses
Which of the following are obligate intracellular parasites?

Chlamydia
Rickettsia
Viruses
All of these

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Viruses
The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is

λ DNA
λ phage enzyme
Phage Mu
Phage Mn

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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
Viruses require __________ for growth.

plants
living cells
animals
bacteria

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Viruses
The viruses in an attenuated vaccine

are usually larger than bacteria
is altered with chemicals
have no genome
continue to replicate

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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

D
B
A
C

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