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Question

Which of the following statements is wrong for viroids?


A
They lack a protein coat
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B
They are smaller than viruses
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C
They cause infections
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D
Their RNA is of high molecular weight
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Solution

The correct option is D Their RNA is of high molecular weight
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 D is correct.

Biology

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