Major feature of bacteria and archea are as follows:
Bacteria are known to possess peptidoglycan in their cell wall. However archea lack peptidoglycan.
Bacteria produce membrane lipids containing fatty acids linked by ester bonds to molecule of glycerol. On the other hand, archaea possess ether bonds connecting fatty acids to a molecule of glycerol.
Bacteria consist of a single RNA polymerase with 4 polypeptides. Whereas archaea possess multiple RNA polymerases which contain multiple polypeptides.
Bacteria possess an initiator tRNA which has a modified methionine whereas archzea possess an initiator tRNA with an unmodified methionine.
Only archaea are of capable of methanogenesis - a form of anaerobic respiration that produces methane.
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