Virus differs from bacterium in having

Options

A. Cell wall
B. Cytosol
C. DNA as genetic material
D. DNA or RNA with no ribosomes.

Answer

To answer the question "Virus differs from bacterium in having," we need to analyze the options provided and understand the fundamental differences between viruses and bacteria.

### Step-by-Step Solution:

1. **Understand the Structure of Viruses and Bacteria**:
- Viruses are acellular entities that lack cellular structures.
- Bacteria are unicellular organisms with a defined cellular structure.

2. **Evaluate Each Option**:
- **Option 1: Cell Wall**:
- Bacteria have a cell wall that provides structural support and protection.
- Viruses do not have a cell wall.
- Therefore, this option is incorrect.

- **Option 2: Cytosol**:
- Bacteria contain cytosol, which is the fluid component inside the cell where cellular processes occur.
- Viruses do not have cytoplasm or cytosol.
- Hence, this option is also incorrect.

- **Option 3: DNA as Genetic Material**:
- Both viruses and bacteria can contain DNA.
- Bacteria have DNA as their genetic material organized in a chromosome, while some viruses can also have DNA.
- Therefore, this option is incorrect as it does not highlight a unique feature of viruses.

- **Option 4: DNA or RNA with No Ribosome**:
- Viruses can have either DNA or RNA as their genetic material, but they do not have ribosomes.
- Ribosomes are necessary for protein synthesis and are present in bacteria.
- This option correctly identifies a unique characteristic of viruses.

3. **Conclusion**:
- The correct answer is **Option 4: DNA or RNA with no ribosome**. This option highlights that viruses differ from bacteria in that they can have either DNA or RNA as genetic material and lack ribosomes, which are essential for protein synthesis in bacteria.

### Final Answer:
Viruses differ from bacteria in having **DNA or RNA with no ribosome**.

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