Biological Classification Question 116
116. Which of the following statements is wrong for viroids?
(a) They lack a protein coat
(b) They are smaller than viruses
(c) They cause infections
(d) Their RNA is of high molecular weight
Show Answer
Answer : d
Hints & Solutions
(d) Viroids, the smallest known pathogens, are naked, circular, single-stranded RNA molecules that do not encode protein but autonomously replicate when introduced into host plants. Viroids only infect plants; some cause economically important diseases of crop plants, while others appear to be benign.
