Wall less gram `Theta` bacteria are called

Options

A. Protoplast
B. Spheroplast
C. Bacterioplast
D. Mycoplasma

Answer

To solve the question "Wall-less gram-positive bacteria are called," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question is asking for the term used to describe wall-less gram-positive bacteria.

2. **Analyzing the Options**:
We have four options to consider:
- Option 1: Protoplast
- Option 2: Spheroplast
- Option 3: Bacterioplast
- Option 4: Mycoplasma

3. **Evaluating Option 1: Protoplast**:
- Protoplasts are bacterial cells that have had their cell wall removed.
- Since the question specifies "wall-less gram-positive bacteria," protoplasts fit this description perfectly as they are derived from gram-positive bacteria after the cell wall has been removed.

4. **Evaluating Option 2: Spheroplast**:
- Spheroplasts are not wall-less; they are bacteria that still have part of their cell wall intact but are bounded by their plasma membrane.
- Therefore, this option does not apply to wall-less bacteria.

5. **Evaluating Option 3: Bacterioplast**:
- The term "bacterioplast" is not commonly used in the context of wall-less bacteria and does not refer to a specific type of bacteria.
- This option is incorrect.

6. **Evaluating Option 4: Mycoplasma**:
- Mycoplasma are indeed wall-less bacteria, but they are classified as gram-negative, which does not fit the requirement of the question for gram-positive bacteria.
- Thus, this option is also incorrect.

7. **Conclusion**:
After evaluating all the options, the only correct answer is **Protoplast**.

### Final Answer:
**Wall-less gram-positive bacteria are called Protoplast.**