Viruses
Which of the following may affect proteins and nucleic acids, but not viruses?

All of these
Denaturation
Enzyme treatment
Pressure

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Viruses
The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities

among different viral hosts than among different viruses
between viruses and their hosts than among different viruses
among different viral hosts than between viruses and their hosts
among different viruses than between viruses and their hosts

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