Viruses
Enzyme neuraminidase is carried by which of the following viruses?

Human immunodeficiency virus
Epstein-Barr virus
Influenza virus
Adenovirus

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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 probably arose from small fragments of cellular chromosomes
Viruses have been successfully grown in pure cultures in test tubes
All viruses are obligatory intracellular parasites

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