NEET2015BotanyBiological ClassificationActual
Select the wrong statement.
Options
- AW.M. Stanley showed that viruses could be crystallized
- BThe term 'contagium vivum fluidum' was coined by M.W. Beijerinek
- CMosaic disease in tobacco and AIDS in human being are caused by viruses
- DThe viroids were discovered by D.J. Ivanowsky
Correct answer
D. The viroids were discovered by D.J. Ivanowsky
Step-by-step solution
Viroids are smaller than viruses, self–replicating particles that were discovered by T.O. Diener (1971). Viroids are infectious RNA particles that are devoid of protein coat. The molecular weight of RNA in viroid is low in comparison to viruses. Potato spindle tuber is a viroid causing disease. DISCOVERIES OF VIROLOGY: Term virus (means venom or poisonous fluid) was coined by Pasteur (1880). D.J. Ivanowsky (1892) recognized certain microbes as causal organisms of the mosaic disease of tobacco. These were foun