Viruses
Viruses largely lack metabolic machinery of their own to generate energy or to synthesize

alcohol
protein
all of these
carbohydrate

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

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

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