The peptidoglycan layer of gram positive bacteria binds with the gram stain, giving positive results. Eubacteria consists of a single circular chromosome in their cytoplasm.ĭepending on the cell wall thickness, eubacteria can be divided into two categories: gram positive and gram negative bacteria. Membrane lipids of eubacteria are ester-linked, straight chains of fatty acids, containing L-glycerol phosphates. Vibrio, rods, filaments and spirochetes are the other shapes of eubacteria. Eubacteria exhibit a variety of shapes and arrangements. Individual eubacterium is 0.5-5 μm in diameter. Other than usual asexual reproduction methods, eubacteria exhibit sexual reproduction methods like conjugation. They also exhibit both parasitic and pathogenic effects on their host organisms. Some eubacteria are involved in the nitrogen cycle as well. Since eubacteria do not consist of membrane-bound organelles, almost all the metabolic reactions take place in the cytoplasm. They are found in most of the habitats on earth like soil, water and inside or outside of large organisms. Archaebacteria is shown in figure 1.Įubacteria are a more complex domain of kingdom monera. Thermophiles live in hot water environments in acid sulfur springs. Halophiles live in water with high concentrations of salts. Methanogens are found in oxygen-free environments like marshes, lake sediments and digestive tracts of animals, producing methane gas. Three types of archaebacteria are found: methanogens, halophiles and thermophiles. Archaebacterial genome consists of a single circular chromosome, which exhibits transcription and translation similar to eukaryotes. According to the structure of cell wall, archaebacteria are more similar to gram positive bacteria. The membrane lipids of archaebacteria are ether-linked, branched aliphatic chains, containing D-glycerol phosphates. The cell wall of archaebacteria is made up of pseudo peptidoglycans. Different shapes are processed by archaebacteria like spheres, rods, plates and spirals. Individual archaebacterium is 0.1-15 μm in diameter. Asexual reproduction of archaebacteria is identified, occurring by binary fission, budding and fragmentation. Archaebacteria are metabolically diverse, using a variety of substrates as their energy and carbon sources. Their pathogenic or parasitic effect is still not observed. Archaebacteria play a vital role in carbon cycle and nitrogen cycle. They are also found in human skin, oral cavity and colon as well. Archaebacteria are found in hot springs, salt lakes, oceans, marshlands and soils. Archebacteria are considered to be evolved just after the first life on earth. What is the difference between Archaebacteria and Eubacteria What is ArchaebacteriaĪrchaebacteria are the single-celled microorganisms, living in extreme environments. – Characteristics, Classification, Types, Examplesģ.
The main difference between archaebacteria and eubacteria is that archaebacteria are usually found in extreme environmental conditions whereas eubacteria are found everywhere on earth. Both archaebacteria and eubacteria are single-celled microorganisms, which are usually called prokaryotes. Main Difference – Archaebacteria vs EubacteriaĪrchaebacteria and eubacteria are two domains of the kingdom: Monera, which contains the least organized unicellular prokaryotic microorganisms on earth.
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