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Viruses

Viruses
Viruses require __________ for growth.

living cells
plants
bacteria
animals

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Viruses
Which of the following is not true of virions?

Are extracellular
Contain DNA
Reproduce independently
Contain RNA

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Viruses
In cell culture, measles virus may lead to

nuclear pyknosis
syncytium formation
rounding and aggregation of cells
transformation of cells

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

protein
carbohydrate
all of these
alcohol

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Viruses
Lysozyme (an endolysin) which will lyse the bacterial cell, releasing the mature virions is present in

late genes
immediate early phage genes
delayed early genes
all of these

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