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Viruses

Viruses
The size of viruses is usually measured in

millimeters
centimeters
micrometers
nanometers

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Viruses
Group E phages have

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

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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

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

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

Enzyme treatment
Pressure
Denaturation
All of these

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Viruses
Usually viruses are separated into several large groups based primarily on

diameter of the viroin or nucleocapsid
nature of the host
nucleic acid characteristics
capsid symmetry

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Viruses
The bacterial viruses having head made up of large capsomeres, but no tail is morphologically classified as

D
B
C
A

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