Question

What are viroids? Who discovered it?

Answer 1

Viroids:

1. Viroids are infectious particles composed of circular strands of RNA without any protein coat.
2. Viroids were discovered by T.O. Diener in 1971.
3. The size of viroids is smaller than the viruses.
4. They generally cause disease in higher plants.
5. Example: Avocado sunblotch viroid, Chrysanthemum stunt viroid, etc.