Mycoplasma differs from virus in being sensitive to

Options

A. Sugar
B. Tetracycline
C. Protein
D. Amino acid

Answer

To solve the question "Mycoplasma differs from virus in being sensitive to," we will analyze the characteristics of Mycoplasma and viruses, and evaluate the options provided.

### Step-by-Step Solution:

1. **Understanding Mycoplasma**:
- Mycoplasma are the smallest known free-living organisms and are classified as bacteria.
- They lack a cell wall, which is a significant feature that distinguishes them from other bacteria.

2. **Understanding Viruses**:
- Viruses are acellular entities that cannot replicate on their own and require a host cell for reproduction.
- They do not have cellular structures like bacteria and are not affected by antibiotics.

3. **Analyzing the Options**:
- **Sugar**: This is a nutrient that can be used by both Mycoplasma and viruses, but it does not indicate sensitivity.
- **Tetracycline**: This is an antibiotic that inhibits protein synthesis by affecting tRNA. Mycoplasma can be sensitive to tetracycline despite lacking a cell wall because tetracycline acts on the protein synthesis machinery.
- **Protein**: This is a macromolecule that is essential for all living organisms, but it does not indicate sensitivity.
- **Amino Acid**: Like protein, amino acids are building blocks for proteins and do not indicate sensitivity.

4. **Conclusion**:
- Since Mycoplasma is sensitive to tetracycline due to its mode of action affecting protein synthesis, while viruses are not affected by antibiotics, the correct answer is **tetracycline**.

### Final Answer:
**Tetracycline**

---