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Biological Classification question

2009 · Q27
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Biological Classification question

2009 · Q27

NEETBiologyBiological ClassificationMCQ+4 / −1
T.O. Diener discovered a
  1. A
    free infectious DNA
  2. B
    infectious protein
  3. C
    bacteriophage
  4. D
    free infectious RNA.
View written solutionFree

Correct answer: D

Theodor O. Diener discovered the Potato Spindle Tuber Viroid (“PSTVd”), the first viroid ever identified, in 1971. PSTVd is a small, circular RNA molecule. Dr. Diener discovered that the pathogen causing potato spindle tuber disease is not a virus, as previously believed, but a much smaller, free RNA molecule.

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