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nuclear envelope
bacteria + archaea = absent; eukarya = present
membrane enclosed organelles
eukarya
peptidoglycan in cell wall
bacteria
membrane lipids
bacteria + eukarya = unbranched hydrocarbons; archaea = some bracnhed hydrocarbons
RNA polymerase
bacteria = one kind; archaea + eukarya = several kinds
initiator amino acids for protein synthesis
bactera= N-formylmethionine; archaea + eukarya = methionine.
introns in genes
bacteria = very rare; archaea = present in some genes; eukarya = present in many genes
response to the antibiotics streptomycin and chloramphenicol
bacteria = growth inhibited; archaea + eukarya = growth not inhibited
histones associated with DNA
bacteria = absent; archaea = present in some species; eukarya = present
circular chromosome
bacteria + archaea = present; eukarya = absent
growth at temperatures > 100C
bacteria + eukarya = no; archaea = some species
