Question:
Theorder O. Diener discovered __________.
Theorder O. Diener discovered __________.
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He worked on potato spindle tuber disease and found an infectious agent smaller than any known virus.
Updated On: Jul 4, 2026
- double stranded RNA
- nucleosomes
- viroids
- heterospory
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The Correct Option is C
Solution and Explanation
Step 1: Theodor O. Diener was a plant pathologist working on the potato spindle tuber disease in the early 1970s.
Step 2: He discovered that the infectious agent responsible was not a virus but a much smaller, naked, circular single-stranded RNA molecule with no protein coat, which he named a viroid.
Step 3: This discovery introduced viroids as an entirely new class of plant pathogens, smaller and simpler than any known virus.
Step 4: Double stranded RNA, nucleosomes and heterospory are unrelated discoveries, so the correct answer is viroids.
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