Write a short note on viroids.

1.	Write a short note on viroids.
Answer» Viroids: 1. These are mainly plant pathogens. 2. Viroids were discovered by Theodor Diener. 3. The first viroid discovered was PSTV (Potato spindle tuber viroid) which causes a disease in potato. 4. Viroids are very small, circular, single stranded RNA which are without any protein coat. 5. Viroids are smaller in size than viruses.

Answer»

Viroids:

1. These are mainly plant pathogens.

2. Viroids were discovered by Theodor Diener.

3. The first viroid discovered was PSTV (Potato spindle tuber viroid) which causes a disease in potato.

4. Viroids are very small, circular, single stranded RNA which are without any protein coat.

5. Viroids are smaller in size than viruses.

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