Viroids lack:
Correct answer: C. Protective protein coat
- A. RNA
- B. Enzyme
- C. Protective protein coat
- D. All of these
Explanation
The correct option is C. Viroids lack a protein coat. Viroids are the smallest known infectious agents. They are composed of a single-stranded RNA molecule that is circular in shape. Viroids do not have a protein coat, which is a protective layer that surrounds the genetic material of other viruses.
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About Acellular Life
Viruses are acellular infectious particles whose capsid, nucleic acid and host-dependent replication distinguish them from living cells. HIV infection covers transmission, replication, effects on helper T cells, progression to AIDS, symptoms, prevention and treatment, while AIDS is the disease state caused by advanced immune-system damage rather than a separate virus.
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