Mycoplasma are insensitive to (a) and sensitive to (b) antibiotic

Options

A. (a) streptomycin, (b) penicillin
B. (a) Erythromycin, (b) streptomycin
C. (a) Chloramphenical, (b) penicillin
D. (a) penicillin, (b) chloramphenicol

Answer

**Step-by-Step Solution:**

1. **Understanding Mycoplasma:**
- Mycoplasma are a type of bacteria that are unique because they lack a cell wall. This characteristic is crucial in understanding their sensitivity to antibiotics.

2. **Identifying Antibiotic Mechanisms:**
- Antibiotics generally work by targeting specific structures or functions in bacteria. For example, penicillin works by inhibiting cell wall synthesis, which is ineffective against organisms that do not have a cell wall.

3. **Analyzing the Given Options:**
- The options provided are:
- (a) Streptomycin
- (b) Penicillin
- (c) Erythromycin
- (d) Chloramphenicol

4. **Determining Insensitivity:**
- Since Mycoplasma lack a cell wall, they are insensitive to antibiotics that target cell wall synthesis. Therefore, they are insensitive to **Penicillin**.

5. **Determining Sensitivity:**
- Mycoplasma can be sensitive to antibiotics that target other bacterial functions, such as protein synthesis. **Erythromycin** and **Chloramphenicol** are examples of antibiotics that can affect protein synthesis. However, among the options, **Erythromycin** is commonly known to be effective against Mycoplasma.

6. **Final Answer:**
- Mycoplasma are insensitive to **Penicillin** and sensitive to **Erythromycin**.