Viruses Vs Viroids
Mediumbiology
What is absent in viroids that is present in typical viruses?
Select the correct option:
Solution
Incorrect! Answer:
Protein coat
- Virus Structure: Consists of a nucleic acid (DNA or RNA) enclosed in a protective protein coat called a capsid.
- Discovery of Viroids: T.O. Diener discovered an infectious agent smaller than viruses.
- Nature of Viroids: They consist only of 'naked' low-molecular-weight circular RNA.
- The Difference: They lack the protein coat (capsid) that is characteristic of viruses. They are mostly known to cause plant diseases like Potato spindle tuber disease.
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About This Question
- Subject
- biology
- Chapter
- diversity in living world
- Topic
- viruses vs viroids
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Protein coat
- Virus Structure: Consists of a nucleic acid (DNA or RNA) enclosed in a protective protein coat called a capsid.
- Discovery of Viroids: T.O. Diener discovered an infectious agent smaller than viruses.
- Nature of Viroids: They consist only of 'naked' low-molecular-weight circular RNA.
- The Difference: They lack the protein coat (capsid) that is characteristic of viruses. They are mostly known to cause plant diseases like Potato spindle tuber disease.
This medium difficulty biology question is from the chapter diversity in living world, covering the topic of viruses vs viroids. It appeared in the 2025 exam.
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