Eubacteria are prokaryotic microorganisms having a single cell that lacks a nucleus and a single circular chromosome that contains DNA.
Eubacteria can be gram-positive or gram-negative, and they are vital in agriculture, medicine, and the economy.
Eubacteria have a cell wall that protects them.
The peptidoglycan wall is made up of cross-linked strands that comprise both amino acid and sugar chains.
The network structure provides the wall with the strength it needs to maintain its size and shape in the face of external osmotic and chemical changes.