Viruses
When a virus enters a cell but does not replicate immediately, the situation is called

fermentation
symbiosis
synergism
lysogeny

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Viruses
Which of the following statements is not true of viruses?

All viruses have either DNA or RNA as their genetic material
Viruses have been successfully grown in pure cultures in test tubes
Viruses probably arose from small fragments of cellular chromosomes
All viruses are obligatory intracellular parasites

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