Question

A. Which of the following shows single
stranded RNA and lacks protein coat?
a. Bacteriophage b. Plant virus
e. Viroid
d. Animal virus​

Answer 1

Answer:

Option (e) Viroid is the correct answer.

Answer 2

Answer:  

Amongst the following shows ‘single stranded RNA’ and lacks protein coat is the Viroid.

Explanation:

Viroids are infectious pathogenic sub microscopic organisms that contain only a single stranded nucleic acid. They do not have any protein coat that covers or protects them, they are found as invisible non-living nucleic acid before it enters the host cell.  

The first identified viroid is the potato spindle tuber disease. Their discovery once was portrayed as a great milestone in the discovery of small entities in biology.