AIIMS 201925 May
- Exam
- AIIMS
- Year
- 2019
- Date
- 25 May
- Subject
- Botany
- Chapter
- Biological Classification
AIIMS 2019 · 25 May · Botany · Biological Classification
An infectious agent even smaller than viruses was discovered by...
An infectious agent even smaller than viruses was discovered by T.O. Diener. Select the incorrect statement about this infectious pathogen.
Options
- AIt causes potato spindle tuber disease.
- BIt is a free infectious RNA.
- CIt has no protein coat as found in viruses.
- DIt causes plants and animal diseases.
Correct answer
D. It causes plants and animal diseases.
Step-by-step solution
Viroids are infectious agents even smaller than viruses that were discovered by T.O. Diener. Viroids are known to cause diseases in plants only.