Viral genes are made up of

DNA only

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RNA only

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either DNA or RNA

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either proteins or nucleic acids

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Solution

The correct option is C either DNA or RNA
A virus has either a DNA or an RNA genome and is called a DNA virus or an RNA virus, respectively. The vast majority of viruses have RNA genomes. Plant viruses tend to have single-stranded RNA genomes and bacteriophages tend to have double-stranded DNA genomes.
So, the correct option is 'either DNA or RNA'.

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