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Viruses

Viruses
Viruses require __________ for growth.

bacteria
animals
plants
living cells

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Viruses
Group E phages have

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

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

Pressure
All of these
Enzyme treatment
Denaturation

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Viruses
Plant viruses may be cultivated in

tissue culture
cultures of separated cells
whole plants
all of these

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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
operon repressor
none of these
immunity operon

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Viruses
During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as

burst size
latent period
eclipse period
rise period

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