Viruses
Group E phages have

single stranded DNA
double stranded DNA
double stranded DNA
single stranded RNA

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

All viruses are obligatory intracellular parasites
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

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