Comparison Between the Domains Bacteria, Archaea, and Eukarya

Comparison Between the Domains Bacteria, Archaea, and Eukarya

Characteristic Bacteria Archaea Eukarya
Cell nucleus No No Yes
Chromosome form Single, circular Single, circular Multiple, linear
DNA replication origins One One or more Many
Histone proteins present No In some species Yes
Peptidoglycan cell wall Yes No No
Polycistronic mRNA Present Present Present
mRNA Introns Absent Absent Absent
Membrane lipids Unbranched, ester-linked
hydrocarbons
Some branched, etherlinked hydrocarbons Unbranched, esterlinked
hydrocarbons
Gas Vesicles Present Present Absent
Ribosome sedimentation
value
70S 70S 80S
Ribosome sensitivity to
diphtheria toxin
No Yes Yes
RNA polymerase One type Several types Several types
First amino acid in a protein Formylmethionine Methionine Methionine
Chlorophyll-based
photosynthesis
Yes (cyanobacteria) No Yes (algae)
Growth above 80°C Some species Some species No
Growth above 100°C No Some species No
Pathogens Some species No Some species

Comparison Between the Domains Bacteria, Archaea, and Eukarya

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