In coliphage viruses, the nucleic acid is

RNA only

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DNA only

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DNA or RNA

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DNA and RNA

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Solution

The correct option is B DNA only
Viruses have either RNA or DNA as their genetic material. The nucleic acid may be single or double-stranded. A coliphage is a type of bacteriophage that infects Escherichia coli. Coliphage is a DNA virus which means it has only DNA as genetic material. So, the correct answer is 'DNA only'.

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