Viruses
In the simplest capsid, there is a capsomere at each of the 12 vertices; this capsomere, which is surrounded by five other capsomeres, is termed a

penton
helical
polyhedra
icosahedral

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Viruses
The oncogene theory refers to

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

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