NTA Abhyas NEET2020BotanyBiological ClassificationPractice
Which of the following statement is not correct for Viroids?
Options
- ACauses potato spindle tuber disease and tobacco mosaic disease
- BIn 1971, TO. Diener discovered these agents
- CViroid was found to be a free RNA, it lacked the protein coat
- DRNA of viroid was of low molecular weight
Correct answer
A. Causes potato spindle tuber disease and tobacco mosaic disease
Step-by-step solution
Viroids are infectious agents that were discovered by T.O. Diener in 1971 . They are smaller than viruses and are found to be in the form of free RNA (without protein coat). Their molecular weight is comparatively low. They cause potato spindle tuber disease. Tobacco mosaic disease is caused by a virus named as Tobacco mosaic virus (TMV).