Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
print Three Domains of Life Table of Comparison Characteristic Bacteria Archaea back Eucarya Habitat some tolerate heat extremes of heat, or decay conditions pressure, saltiness, decay intolerant of extreme heat and saltiness, few tolerate harsh conditions DNA small loop small loop Membrane-bound nucleus Absent Absent very large molecules bundled in chromosomes Present Organelles Absent Absent Present Cell Wall of peptidoglycan unique, not made of peptidoglycan Membrane lipids Ester-linked Ether-linked where present, made of cellulose and other unique materials Ester-linked Ribosomes 70S 70S Initiator tRNA Formyl-methionine Methionine 80S (70S in organelles) Methionine Protein synthesis sensitive to diptheria toxin No Yes Yes One-type (4 subunits) Several types (8-12 subunits) 3 types (12-14 subunits) Sensitivity to chloramphenicol, streptomycin, kanamycin Yes No No Methanogenesis (metabolism that generates methane) No Yes No Nitrogen fixation Yes Yes No Chlorophyll-based photosynthesis Yes No Yes RNA polymerases Visualizing Cell Processes (rd Edition) © BioMEDIA ASSOCIATES back