Mycoplasma is resistant to the action of which antibiotics ?

Options

A. Tetracycline
B. Streptomycin
C. Penicillin
D. Erythromycin

Answer

**Step-by-Step Solution:**

1. **Understanding Mycoplasma**: Mycoplasma are a group of bacteria that are unique because they completely lack a cell wall. This characteristic is crucial to understanding their resistance to certain antibiotics.

2. **Role of Antibiotics**: Antibiotics are substances that can inhibit the growth of or kill bacteria. Many antibiotics target specific structures in bacteria, such as the cell wall, which is essential for the bacteria's survival.

3. **Identifying Antibiotics**: The question provides a list of antibiotics: Tetracycline, Streptomycin, Penicillin, and Erythromycin. We need to determine which of these antibiotics Mycoplasma is resistant to.

4. **Mechanism of Action**:
- **Penicillin**: This antibiotic works by inhibiting the synthesis of the bacterial cell wall. Since Mycoplasma do not have a cell wall, Penicillin is ineffective against them.
- **Tetracycline and Erythromycin**: These antibiotics work by inhibiting protein synthesis and can still affect Mycoplasma.
- **Streptomycin**: This antibiotic also targets protein synthesis and can affect Mycoplasma.

5. **Conclusion**: Since Mycoplasma lack a cell wall, they are resistant to Penicillin. Therefore, the answer to the question is that Mycoplasma is resistant to Penicillin.

**Final Answer**: Mycoplasma is resistant to Penicillin.

---