Archaebacteria differ from eubacteria in?

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Answer

Answer

Archeabacteria different from eubacteria in that eubacteria has two cell membrane composed mainly of glycerol - ester lipids, while archaebacteria have a membrane made up of glycerol - ether lipid. ... This stability help archaebacteria survive at high temperature and in very acidic or alkaline environment.

Answer

Archaebacteria are older forms of bacteria known to exist during the asteroid collision in dinosaur age. They can survive in extremely harsh situations like Sulphur springs, snowy area, etc. Eubacteria or true bacteria include the recent forms of bacteria we study.

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Archaebacteria are older and live in much more extreme conditions, from ranging temperatures to pressures, like at the bottom of the sea. Also, they are similar to bacteria, but are not true bacteria. Eubacteria are the opposite, and vary quite significantly in shape. All bacteria, however, are single-celled and prokaryotes.

Answer

Archaebacteria differ from eubacteria in the following ways:

1. Cell Wall Composition:
- Archaebacteria have cell walls that are composed of proteins, polysaccharides, or pseudopeptidoglycan, which is a modified form of peptidoglycan.
- Eubacteria, on the other hand, have cell walls that are composed of peptidoglycan, a polymer consisting of sugars and amino acids.

2. Plasma Membrane Structure:
- The plasma membrane of archaebacteria differs from that of eubacteria in terms of the arrangement of lipids. Archaebacterial membranes contain unique lipids called branched hydrocarbon chains, whereas eubacteria have straight hydrocarbon chains.
- Additionally, archaebacterial membranes have a lipid monolayer or bilayer, while eubacterial membranes have a lipid bilayer.

3. Genetic Makeup:
- Archaebacteria possess a unique genetic makeup that is distinct from both eubacteria and eukaryotes. They have genes that are more similar to eukaryotes than to eubacteria.
- Eubacteria, on the other hand, have genes that are more similar to each other and distinct from those found in archaebacteria and eukaryotes.

4. Metabolic Pathways:
- Archaebacteria are known for their ability to survive in extreme environments, such as hot springs, acidic environments, and high-salt environments. They possess unique metabolic pathways that allow them to withstand these harsh conditions.
- Eubacteria have a wider range of metabolic capabilities and can be found in various habitats, including soil, water, and the human body. They have diverse metabolic pathways that enable them to perform different functions.

5. Sensitivity to Antibiotics:
- Archaebacteria are generally less sensitive to antibiotics that target the cell wall, such as penicillin, due to the absence or modified composition of peptidoglycan in their cell walls.
- Eubacteria, on the other hand, are more susceptible to these antibiotics because their cell walls contain peptidoglycan, which is the target of such drugs.

6. Evolutionary History:
- Archaebacteria are considered to be more ancient and have a distinct evolutionary history compared to eubacteria. They are believed to have diverged from the common ancestor of all life forms earlier than eubacteria.
- Eubacteria, on the other hand, are more closely related to the common ancestor of all life forms and have undergone more recent evolutionary diversification.

In conclusion, archaebacteria and eubacteria differ in terms of their cell wall composition, plasma membrane structure, genetic makeup, metabolic pathways, sensitivity to antibiotics, and evolutionary history. These differences reflect their unique adaptations to different environments and contribute to their distinct characteristics and abilities.

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