NEET 2016 Phase 2 · BiologyViroids lichensPrevious Year Question
Which of the following statements is wrong for viroids?
Answer: (D) Their RNA is of high molecular weight. Answer: (D) Their RNA is of high molecular weight Solution: This statement is wrong.
- A.They lack a protein coat
- B.They are smaller than viruses
- C.They cause infections
- D.Their RNA is of high molecular weight✓
Correct Answer
(D) Their RNA is of high molecular weight
Solution & Explanation
Answer: (D) Their RNA is of high molecular weight Solution: This statement is wrong. The RNA of a viroid is of LOW molecular weight. Viroids lack a protein coat (free RNA), are smaller than viruses, and do cause infections (e.g., potato spindle tuber disease), so the other three statements are correct. NCERT Reference: NCERT Class XI, Biological Classification, p.21, line 30 — "The RNA of the viroid was of low molecular weight"
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