Viruses
The repressor protein, since the cell is resistant to lysis from externally infecting phage, is also called

none of these
immunity repressor
immunity operon
operon repressor

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Viruses
The function of a viral capsid is

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

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