Question

What are viroids in biology?

Answer 1

Viroids:

1. Viroids are infectious particle 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. Viroids lack protein coat.
5. Viroids generally affect higher plants.
6. Example: Avocado sunblotch viroid, Chrysanthemum stunt viroid, etc.