The only human disease caused by Viroid is
Correct answer: D. Hepatitis D
- A. Hepatitis A
- B. Hepatitis B
- C. Hepatitis C
- D. Hepatitis D
Explanation
Viroids are infectious agents that consist only of naked RNA without any protective layer such as a protein coat. Hepatitis D, also known as the hepatitis delta virus, is an infection that causes the liver to become inflamed. This swelling can impair liver function and cause long-term liver problems, including liver scarring and cancer. The condition is caused by the hepatitis D virus (HDV). Hepatitis D only occurs in people who are also infected with the hepatitis B virus. It is the only human disease known to be caused by a viroid.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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