Pseudomurein occurs in

Options

A. Bacteria
B. Archaebacteria
C. Mycoplasmas
D. Cyanobacteria

Answer

To answer the question "Pseudomurein occurs in," we will analyze the options provided and determine where pseudomurein is found.

### Step-by-Step Solution:

1. **Understanding Pseudomurein**:
- Pseudomurein is also known as pseudopeptidoglycan. It is a major component of the cell wall in certain organisms.
- It resembles bacterial peptidoglycan but is structurally different.

2. **Analyzing the Options**:
- **Bacteria**:
- Bacteria have true peptidoglycan in their cell walls, not pseudomurein. Therefore, this option is incorrect.
- **Mycoplasma**:
- Mycoplasma are known as pleuropneumonia-like organisms (PPLO) and are the smallest known organisms. They lack a cell wall and do not contain pseudomurein. Thus, this option is also incorrect.
- **Cyanobacteria**:
- Cyanobacteria, also known as blue-green algae, do not have pseudomurein in their cell walls. This option is incorrect as well.
- **Archaebacteria (Methanogens)**:
- Methanogens, which are a type of archaebacteria, have pseudomurein in their cell walls. This is the correct option.

3. **Conclusion**:
- Based on the analysis, the correct answer to the question "Pseudomurein occurs in" is **Archaebacteria** (specifically in methanogens).

### Final Answer:
Pseudomurein occurs in **Archaebacteria**.

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