Main distinction – Archaebacteria vs Eubacteria

Archaebacteria and also eubacteria are two domain names of the kingdom: Monera, which includes the least organized unicellular prokaryotic microorganisms on earth. Both archaebacteria and also eubacteria space single-celled microorganisms, which are usually dubbed prokaryotes. The main difference between archaebacteria and eubacteria is the archaebacteria are usually discovered in extreme environmental conditions whereas eubacteria are found everywhere ~ above earth.

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This write-up examines,

1. What is Archaebacteria – Characteristics, Classification, Types, Examples 2. What is Eubacteria – Characteristics, Classification, Types, Examples 3. What is the difference between Archaebacteria and Eubacteria


What is Archaebacteria

Archaebacteria space the single-celled microorganisms, life in too much environments. They type a domain that kingdom monera. Archebacteria are taken into consideration to be evolved just ~ the first life ~ above earth. Hence, castle are dubbed ancient bacteria. Archaebacteria are found in hot springs, salt lakes, oceans, marshlands and soils. They are also found in person skin, oral cavity and colon together well. Archaebacteria beat a an essential role in carbon cycle and also nitrogen cycle. Your pathogenic or parasitic result is still not observed. Archaebacteria are metabolically diverse, making use of a selection of substrates as their energy and also carbon sources. Asexual reproduction of archaebacteria is identified, emerging by binary fission, budding and also fragmentation.

Individual archaebacterium is 0.1-15 μm in diameter. Various shapes room processed through archaebacteria choose spheres, rods, plates and also spirals. Some cells are flat or square-shaped. The cell wall surface of archaebacteria is consisted of of pseudo peptidoglycans. The membrane lipids of archaebacteria room ether-linked, branched aliphatic chains, comprise D-glycerol phosphates. According to the structure of cell wall, archaebacteria are an ext similar to gram positive bacteria. Archaebacterial genome is composed of a single circular chromosome, i m sorry exhibits transcription and translation similar to eukaryotes.

Three types of archaebacteria space found: methanogens, halophiles and also thermophiles. Methanogens are uncovered in oxygen-free environments like marshes, lake sediments and digestive tracts of animals, producing methane gas. Halophiles live in water v high concentrations of salts. Thermophiles live in hot water atmospheres in mountain sulfur springs. Archaebacteria is displayed in figure 1.


Figure 1: Archaebacteria

What is Eubacteria

Eubacteria room a more complex domain of kingdom monera. Lock are discovered in many of the habitats on earth like soil, water and also inside or external of huge organisms. Due to the fact that eubacteria do not consists membrane-bound organelles, practically all the metabolic reactions take location in the cytoplasm. Part eubacteria are connected in the nitrogen cycle together well. They additionally exhibit both parasitic and pathogenic effects on their organize organisms. Other than usual asexual reproduction methods, eubacteria exhibit sexual reproduction techniques like conjugation.

Individual eubacterium is 0.5-5 μm in diameter. Eubacteria exhibit a selection of shapes and arrangements. Cocci and bacilli are the significant shapes. Vibrio, rods, filaments and spirochetes room the various other shapes that eubacteria. Membrane lipids of eubacteria are ester-linked, right chains of fat acids, include L-glycerol phosphates. Eubacteria consists of a solitary circular chromosome in your cytoplasm.

Depending on the cell wall thickness, eubacteria deserve to be divided into 2 categories: gram positive and also gram negative bacteria. The peptidoglycan class of gram optimistic bacteria binds v the gram stain, offering positive results. The cell wall structure the gram an adverse bacteria is more complex than gram optimistic bacterial cell wall and i can not qualify of binding with gram stain. Eubacteria are displayed in figure 2.


Figure 2: Eubacteria

Difference in between Archaebacteria and Eubacteria

Alternative Names

Archaebacteria: Archaebacteria space called ancient bacteria.

Eubacteria: Eubacteria are referred to as true bacteria.


Archaebacteria: Individual archaebacterium is 0.1-15 μm in diameter.

Eubacteria: Individual eubacterium is 0.5-5 μm in diameter.


Archaebacteria: Archaebacteria space spheres, rods, plates, spiral, flat or square-shaped.

Eubacteria: Eubacteria space cocci, bacilli, vibrio, rods, filaments or spirochetes in shape.


Archaebacteria: Archaebacteria are basic in your organization.

Eubacteria: Eubacteria space more complex than archaebacteria.


Archaebacteria: Archaebacteria are discovered in excessive environments.

Eubacteria: Eubacteria are uncovered everywhere on earth.

Cell Wall

Archaebacteria:  Cell wall is created of pseudo peptidoglycans.

Eubacteria: Cell wall surface is written of peptidoglycans v muramic acid.

Membrane Lipids

Archaebacteria: Membrane lipids the archaebacteria is ether-linked, branched, aliphatic chains, include D-glycerol phosphate.

Eubacteria: Membrane lipids the eubacteria space ester-linked, right chains of fat acids, containing L-glycerol phosphates.

RNA Polymerase

Archaebacteria: RNA polymerase the archaebacteria is composed of a complicated subunit pattern, i m sorry is comparable to eukaryotic RNA polymerase.

Eubacteria: RNA polymerase that eubacteria is composed of a simple subunit pattern.

Transfer RNA

Archaebacteria: No thymine is current in the TψC eight of the tRNA, carrying methionine. 

Eubacteria: Thymine is current in many of the tRNA, moving N-formyl methionine.


Archaebacteria: Introns are present in archaebacteria.

Eubacteria: Introns are missing in eubacteria.

Growth and Reproduction

Archaebacteria: Asexual reproduction techniques like binary fission, budding and also fragmentation are provided by archaebacteria throughout their reproduction.

Eubacteria: various other than binary fission, budding and also fragmentation, eubacteria are capable of developing spores in order to continue to be dormant throughout unfavorable conditions.

Glycolysis/Kreb’s cycle

Archaebacteria:  Archaebacteria exhibit no glycolysis nor Kreb’s cycle.

Eubacteria: Eubacteria exhibit both glycolysis and also Kreb’s cycle.


Archaebacteria: Archaebacteria space three types: methanogens, halophiles and also thermophiles.

Eubacteria: Eubacteria are two types: gram positive and gram negative.


Archaebacteria: Halobacterium, Lokiarchaeum, Thermoproteus, Pyrobaculum, Thermoplasma and Ferroplasma are the examples of archaebacteria.

Eubacteria: Mycobacteria, Bacillus, Sporohalobacter, Clostridium and also Anaerobacter space the instances of eubacteria.

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Archaebacteria, eubacteria and also cyanobacteria room the three domains of kingdom monera. Archaebacteria space called old bacteria conversely, the eubacteria are called true bacteria. Eubacteria space usually found in soil, water, life in and also on of large organisms. Eubacteria are separated into two groups known as gram positive and also gram an unfavorable bacteria. Archaebacteria are found in salt brines, ocean depths and hot springs. Castle have progressed just after ~ the development of first life top top earth. Three types of archaebacteria space found: methanogens, halophiles and thermoacidophiles. The main difference in between archaebacteria and eubacteria is your habitats in the environment.

Reference: Esko, Jeffrey D. “Eubacteria and also Archaea.” Essentials the Glycobiology. Second edition. U.S. National Library the Medicine, 01 Jan. 1970. Web. 18 Apr. 2017. “Kingdom Archaebacteria – six Kingdoms.” Google Sites. N.p., n.d. Web. 18 Apr. 2017. Eubacteria. N.p., n.d. Web. 18 Apr. 2017. .

Image Courtesy:1. “Archaea” through Kaden11a – Own work (CC BY-SA 4.0) via Commons Wikimedia2. “EscherichiaColi NIAID” By Rocky mountain Laboratories, NIAID, NIH – NIAID (Public Domain) via Commons Wikimedia