Viruses
The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is called

spontaneous infection
inductive infection
spontaneous induction
resultant induction

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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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