How are viroids different form viruses ?

Explanation

Viruses :
(1) They larger than viroids
(2) They have a protein coat.
(3) Genetic material consists of DNA or RNA .
(4) If RNA present , has a high molecular mass.
Viroids :
(1) They are smaller than viruses.
(2) They lack a protein coat.
They are RNA particles.
(4) Their RNA has a lower molecular mass.