Question
Which of the following is always present in a Virus ?
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Capsid
Identifying the Essential Virus Component
The question asks to identify the component that is universally present in all viruses.
Let's analyze the options:
- Capsid: This is a protective protein coat surrounding the virus's genetic material (DNA or RNA). All viruses possess a capsid, making it a defining structural feature.
- Envelope: Some viruses have an outer lipid envelope derived from the host cell, but many viruses (naked viruses) lack this structure. Therefore, it is not always present.
- Ribosome: Viruses are metabolically inert and lack the cellular machinery for protein synthesis, including ribosomes. They rely on the host cell's ribosomes.
- Mitochondria: These are energy-producing organelles found in eukaryotic cells. Viruses are acellular and do not contain organelles like mitochondria.
Based on the analysis, the capsid is the only component consistently found in every type of virus.
Conclusion
The structure that is always present in a virus is its protective protein coat, the capsid.
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