Mycoplasmas differ from viruses in that they are sensitive to

Options

A. penicillin
B. tetracyclines
C. sugars
D. amino acids

Answer

To solve the question regarding how mycoplasmas differ from viruses, particularly in terms of sensitivity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Mycoplasmas**: Mycoplasmas are a type of bacteria, specifically known as the smallest free-living organisms. They are unique because they lack a cell wall.

2. **Understand Viruses**: Viruses are not classified as living organisms in the same way bacteria are. They do not have cellular structures and cannot reproduce independently; they require a host cell to replicate.

3. **Identify Sensitivity**: The question asks about the sensitivity of mycoplasmas compared to viruses. Mycoplasmas can be affected by certain antibiotics, while viruses cannot be treated with antibiotics.

4. **Consider the Options**: The options provided are:
- A) Penicillin
- B) Tetracycline
- C) Sugar
- D) Amino Acid

5. **Evaluate the Options**:
- **Penicillin**: This antibiotic targets the cell wall of bacteria. Since mycoplasmas lack a cell wall, they are resistant to penicillin.
- **Tetracycline**: This antibiotic is effective against a wide range of bacteria, including mycoplasmas, as it targets protein synthesis.
- **Sugar and Amino Acid**: These are not antibiotics and do not relate to sensitivity in the context of bacterial or viral treatment.

6. **Conclusion**: Since mycoplasmas are sensitive to tetracycline and resistant to penicillin, the correct answer is **B) Tetracycline**.

### Final Answer:
Mycoplasmas differ from viruses in that they are sensitive to **tetracycline**.

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