Viruses
The envelope of an enveloped virus is derived from

none of these
the mitochondrion of the cell
the cell membrane
the endoplasmic reticulum of the cell

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Viruses
The oncogene theory refers to

how viruses transform normal cells into tumor cells
how viruses replicate in host cells
how chemicals inactivate viruses when applied
none of these

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Viruses
The function of a viral capsid is

protection against the viral genome from physical and enzymatic destruction
All of these
providing binding sites that enable the virus to attach to specific receptor sites on the host cell
serving as a vehicle of transmission from one host to another

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