Question

Viroids have:

• A. single stranded RNA not enclosed by protein coat
• B. single stranded DNA not enclosed by protein coat
• C. double stranded DNA enclosed by protein coat
• D. double stranded RNA enclosed by protein coat

Answer 1

Answer: (A)

Viroids are small, single stranded, circular RNA molecules not enclosed by protein coat. They are discovered by T.O. Diener in 1971. Viroid replication requires host encoded RNA polymerase.