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    Question

    Regarding viral genetic material, which statement is

    correct?
    A All viruses contain both DNA and RNA Correct Answer Incorrect Answer
    B Viruses have either DNA or RNA, never both Correct Answer Incorrect Answer
    C Plant viruses exclusively contain RNA Correct Answer Incorrect Answer
    D Animal viruses exclusively contain DNA Correct Answer Incorrect Answer
    E Viroids contain dsDNA Correct Answer Incorrect Answer

    Solution

    Viruses are categorized based on their genetic material. They contain either DNA or RNA, but never both simultaneously. Viroids (option e) are infectious agents with circular RNA, not DNA. Options c and d are incorrect as plant/animal viruses can have either DNA or RNA.  

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