Viruses
The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is

Phage Mu
Phage Mn
λ phage enzyme
λ DNA

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Viruses
The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities

among different viral hosts than between viruses and their hosts
between viruses and their hosts than among different viruses
among different viruses than between viruses and their hosts
among different viral hosts than among different viruses

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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
Viruses have been successfully grown in pure cultures in test tubes
All viruses are obligatory intracellular parasites

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