1.

    Which statement about the structure of viroids is FALSE?

    A

    They are composed of double-stranded RNA.

    B

    They lack a protein coat.

    C

    They have a circular RNA molecule.

    D

    They are smaller than viruses.

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    3.

    Which of the following statement is false?

    A

    TMV has a double-stranded RNA molecule

    B

    Most plant viruses are RNA viruses

    C

    The bacteriophage has a double-stranded DNA molecule

    D

    Most animal viruses are DNA viruses

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