Cell wall structure of eubacteria and differentiate it from cell wall of archaebacteria

Eubacteria, also known as true bacteria, have a complex cell wall structure. The cell wall of eubacteria is primarily composed of peptidoglycan, a polymer consisting of sugars and amino acids. This peptidoglycan layer provides structural strength and protection to the bacterial cell. In addition to peptidoglycan, the cell wall of eubacteria may also contain other substances like lipopolysaccharides, teichoic acids, and proteins.

The cell wall structure of eubacteria can be further classified into two types based on the Gram stain technique: Gram-positive and Gram-negative. Gram-positive bacteria have a thick peptidoglycan layer, while Gram-negative bacteria have a thin peptidoglycan layer and an additional outer membrane.

On the other hand, the cell wall of archaebacteria, also known as archaea, is fundamentally different from that of eubacteria. Archaebacteria do not have peptidoglycan in their cell walls. Instead, their cell walls are typically composed of pseudopeptidoglycan or other polymers, such as proteins, glycoproteins, or polysaccharides.

Moreover, the cell membrane lipids of archaebacteria are unique. Unlike eubacteria, which have fatty acids attached to a glycerol backbone by ester linkages, archaebacteria have isoprenoid chains attached to a glycerol backbone by ether linkages. This difference in cell membrane structure makes archaebacteria more resistant to extreme conditions, such as high temperatures and acidic environments.

In summary, the main difference between the cell wall structure of eubacteria and archaebacteria lies in the composition of their cell walls and cell membranes. Eubacteria have a peptidoglycan-based cell wall and ester-linked membrane lipids, while archaebacteria have a cell wall without peptidoglycan and ether-linked membrane lipids.