Viruses
The envelope of which of the following viruses is derived from the host cell nucleus?

Retroviruses
Orthomyxoviruses
Paramyxoviruses
Herpesviruses

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Viruses
The function of a viral capsid is

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
protection against the viral genome from physical and enzymatic destruction
All of these

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