Prokaryotic Cells

Prokaryotic Cells - i. Hot springs (volcanic)...

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Prokaryotic Cells (In the Garbage Can group) 1. 2 domains included a. Archaea b. Eubacteria 2. properties of prokaryotic cells a. Lack chromosomes; naked circular DNA b. No organelles (membrane bound) c. Generally much smaller than eukaryotic cells (typical 10-100x smaller) 3. Archaeans a. Unusual lipid chemistry i. Ether-containing lipids (based) b. Ribosomes have unique structure c. Tend to be larger than other eubacteria, many approach eukaryotes in size d. Found in a huge range of habitats/environments, but are famous for being extremophiles (wanting to be in hostile conditions)
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Unformatted text preview: i. Hot springs (volcanic) (cemosynthesis – journal) ii. Deep inside the earth iii. Hyper-acidic environments iv. Hyper-saline environments v. Able to tolerate high levels of radiation 4. Domain Eubacteria a. “typical” bacteria b. Occupy a huge array of ecological roles i. Chemosynthetic ii. Photosynthetic : cyanobacteria = blue-green algae iii. Heterotrophic (break down organic molecules to make ATP; eat food) iv. May be colonial or solitary 1. can form organized colonies called bio-film (three dimensional bacteria community)...
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This note was uploaded on 09/14/2011 for the course BIO 1001 taught by Professor Staff during the Fall '08 term at Cornell.

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