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Biology · BIOLOGICAL CLASSIFICATION

हिन्दी

T.O. Diener (1971) discovered 'viroids' as the causative agent of potato spindle tuber disease. How do viroids structurally differ from conventional viruses?

  1. Viroids consist of free, low-molecular-weight RNA that completely lacks a protein coat
  2. Viroids consist of high-molecular-weight double-stranded DNA wrapped in capsomeres
  3. Viroids consist exclusively of misfolded proteins devoid of any nucleic acid genome
  4. Viroids consist of single-stranded RNA enclosed inside a thick chitinous cell wall

Correct answer · Option 1

Viroids consist of free, low-molecular-weight RNA that completely lacks a protein coat

Explanation

Viroids were found to be free RNA lacking a protein coat that is found in viruses; hence the name viroid. The RNA of the viroid was of low molecular weight.

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