Archaebacteria do not show

Options

A. 1. Peptidoglycan in cell wall
B. 2. Introns in DNA
C. 3. Branched chain lipids in cell membrane
D. 4. Ribosomal proteins with highly acidic nature

Answer

### Step-by-Step Solution:

1. **Understanding Archaebacteria**:
- Archaebacteria are a group of microorganisms that are distinct from other bacteria. They belong to the kingdom Archaea and are known for their ability to thrive in extreme environments.

2. **Characteristics of Archaebacteria**:
- They are often found in extreme conditions such as high salinity, extreme temperatures, and acidic or alkaline environments.

3. **Cell Wall Composition**:
- One of the key differences between Archaebacteria and other bacteria (like Eubacteria) is their cell wall composition.
- Archaebacteria do not have a cell wall made of peptidoglycan, which is a characteristic feature of Eubacteria.

4. **Unique Features of Archaebacteria**:
- Instead of peptidoglycan, Archaebacteria have cell walls made up of polysaccharides and proteins.
- They also possess unique features such as branched-chain lipids in their membranes and specific ribosomal proteins.

5. **Conclusion**:
- Therefore, the statement that "Archaebacteria do not show" refers to the absence of a peptidoglycan cell wall.

### Final Answer:
Archaebacteria do not show peptidoglycan cell walls.

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