What characteristics distinguish archabacteria from eubacteria?

Question

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Answer 1

Archaea have two interesting differences, their antibiotic resistance and their tRNA.
Antibiotics effective against bacteria have little impact on Archaea however they are sensitive to some antibiotics that affect the Eukarya. There is one theory that archaea arose from the gram positive bacteria due to antibiotic selection. The bacteria that developed the ability to produce antibiotics selected for strains resistant to this environment. The resistant strain became the common ancestor of present day Archaea. In the process of avoiding the antibiotic bacteria the early Archaea were forced into extreme environments.

These extreme environments require unique versions of tRNA stem loop formation. In high heat protection against exceeding the melting point of base-paired stems is required or a degree of shape flexibility in the tRNA must be maintained in very cold places. These modifications are done after translation.

Answer 2

Archaebacteria live in quite extreme conditions; for example, salty lakes. Eubacteria is the type of bacteria that we encounter all the time - the "normal" or "regular" type. Eubacteria is found in varied environments. Eubacteria have cell walls made of peptidoglycan while Archaebacteria cell walls are composed of several different substances.

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Laurie