It is very stable and allows viruses to exist in water, air, and the ground.
Correct answer: D. Capsid
- A. Nucleoproteins
- B. Nucleocapsid
- C. Tail of virus
- D. Capsid
Explanation
a. Nucleoproteins-Proteins bound to nucleic acids; important for genome function but not for environmental stability.b. Nucleocapsid-Viral genome plus capsid; protects the genome, but stability mainly comes from the capsid.c. Tail of virus-Found in some bacteriophages; used for attachment and injection, not for stability.d. Capsid (Correct Answer)-Protein shell protecting the viral genome; crucial for stability and survival in water, air, and soil.
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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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