Eduprobe
Question:
Which of the following statements is wrong for viroids?
Their RNA is of high molecular weight
They are smaller than viruses
They cause infections
They lack a protein coat
Solution:
Viroids are infectious, nonprotein-coding, highly structured small circular low-molecular-weight ribonucleic acids (RNAs) able to replicate autonomously and induce diseases in higher plants. Viroids are single-stranded covalently closed circular RNA molecules existing as highly base-paired rod-like structures. So, option A is correct because the statement 'Their RNA is of high molecular weight' is wrong. Viroids have low molecular weight RNA.