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Viruses

Viruses
Viruses require __________ for growth.

animals
bacteria
living cells
plants

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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

Phage Mn
Phage Mu
λ DNA
λ phage enzyme

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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
Both (a) and (b)
the prophage
lytic infection by other viruses

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Viruses
Viruses largely lack metabolic machinery of their own to generate energy or to synthesize

carbohydrate
alcohol
protein
all of these

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Viruses
Enveloped viruses have a __________ shape.

icosahedral
roughly spherical
helical
complex

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Viruses
The infected cells continue to reproduce themselves as well as the virus, and the mature virions are extruded from the cell surface continuously over a long period of time. This type of release mechanism is called a

productive infection
all of these
inductive infection
resultant infection

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