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STD 11 - 2. Biology classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 2. Biology classification1 Mark
MCQ
T.O. Diener discovered a
  • A
    free infectious $DNA$
  • B
    infectious protein
  • C
    bacteriophage
  • ✓
    free infectious $RNA.$
✓

Answer

Correct option: D.
free infectious $RNA.$
d
(d) : Viroids are infectious $RNA$ particles which were discovered by T.O. Diener $(1971)$. These are devoid of protein coat and cause diseases in plants only, $e.g.$, potato spindle tuber, chrysanthemum stunt etc.

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