Differences b/t Archeae, Bacteria, Eukarya

Differences b/t Archeae, Bacteria, Eukarya - Pili imvolved...

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Eukarya Archae Gram-negative bacteria Gram-positive bacteria Nucleus? Yes No No No Membrane Phospholipid Bilayer Phospholipid Monolayer (ether linked) Phospholipid Bilayer (inner membrane) and outer membrane with polysaccharide Phospholipid Bilayer Molecules to increase membrane stability Cholesterol (or other sterol) Phytanyl group (ether linked) Hopanoids Cell wall Plants have cellulose cell wall Some have Psedomurein cell wall, some have whole protein cell wall (s-layer), some have no wall Peptidoglycan cell wall of β -1-4- linked NAG and NAM between two cell membranes defining a periplasm. Can also have s-layer Thick Peptidoglycan cell wall of β -1- 4-linked NAG and NAM Flagella Like a type IV pilus - motor stuck in cytoplasm, driven by ATP hydrolysis
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Unformatted text preview: Pili imvolved in genetic exchange. Whipping flagellum similar to type III pili. Mot proteins are stator basal body is rotor Other External features Slime structures (polysaccharides) often branched and repeated hold onto H2O very well. Haemus structures are used for grappling and anchoring. Internal features Cytoskeleton of actin Many bacteria and archae have cytoskeleton of MreB, an actin analog, which gives rod shape. Macroscopic features Biofilms are assemblages of bacteria and archea. Can provide protection and is useful in symbiotic relationships. Slime tubes coordinate O2, H2S balance. Other FTS-Z Gene coordinates Z-ring around cell for binary fission. Use PHB to store reduced carbon....
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