Multiple choice

Viroids are well known plant pathogens. Which of the following statements does not characterise viroids?

  1. Viroid RNA does not code for any protein.

  2. Viroid causes hepatitis D in humans.

  3. Viroids are infectious agents composed solely of circular single-stranded DNA.

  4. The viroid siRNAs contains sequences capable of complementary base pairing with the plant's mRNAs.

  5. Some viroids are ribozymes also.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Viroids are infectious agents composed solely of circular single-stranded RNA which folds over on itself to form some double stranded regions. These are catalytic RNAs (ribozymes).

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