Viruses are made of

Options

A. lipoprotein
B. glycosides
C. nucleoprotein
D. lipids.

Answer

### Step-by-Step Solution:

1. **Understanding Viruses**: Viruses are unique infectious agents that can only replicate inside the living cells of a host. Outside of a host, they are inactive and behave like inert particles.

2. **Composition of Viruses**: The primary components of viruses include:
- **Nucleic Acid**: This can either be DNA (Deoxyribonucleic Acid) or RNA (Ribonucleic Acid). This genetic material carries the information necessary for the virus to replicate and infect host cells.
- **Protein Coat (Capsid)**: The nucleic acid is surrounded by a protective layer called the capsid, which is made of protein. This protein coat helps protect the viral genetic material and aids in the infection process.

3. **Additional Components**: Some viruses may also have:
- **Lipid Envelope**: This is a layer made of lipids that surrounds some viruses, derived from the host cell membrane. However, not all viruses have this lipid envelope.
- **Lipoproteins and Glycosides**: While lipoproteins (composed of lipids and proteins) can be associated with some viruses, glycosides (which are carbohydrates) are not typically a component of viruses.

4. **Conclusion**: Therefore, viruses are primarily made of nucleoprotein, which consists of nucleic acid (DNA or RNA) and protein (capsid).

### Final Answer:
Viruses are made of nucleoprotein, which consists of nucleic acid (either DNA or RNA) and a protein coat (capsid). Some viruses may also have a lipid envelope.

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