The uniqueness in Archaebacteria is the presence of

Options

A. peptidoglycan rich cell wall
B. ether linked long branched alcohols bound to glycerol
C. both statements are correct.
D. nuclear membrane

Answer

**Step-by-Step Solution:**

1. **Understanding Archaebacteria**: Archaebacteria, also known as Archaea, are a unique group of prokaryotic microorganisms. They are characterized by their single-celled structure and the absence of a well-defined nucleus.

2. **Cell Wall Composition**: One of the distinctive features of Archaebacteria is that their cell walls do not contain peptidoglycan, which is commonly found in the cell walls of other bacteria. This sets them apart from typical bacteria.

3. **Presence of Unique Lipids**: The most significant uniqueness in Archaebacteria is the presence of ether-linked long branched alcohols bound to glycerol. This type of lipid structure is different from the ester-linked lipids found in other organisms.

4. **Survival in Extreme Conditions**: Archaebacteria are known for their ability to thrive in extreme environments, such as high temperatures, high salinity, and acidic conditions, where most other organisms cannot survive.

5. **Conclusion**: Therefore, the uniqueness in Archaebacteria is primarily due to the presence of ether-linked long branched alcohols bound to glycerol, which is a distinctive characteristic of their cell membrane structure.

**Final Answer**: The uniqueness in Archaebacteria is the presence of ether-linked long branched alcohols bound to glycerol.

---