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Chapter 28
"Prokaryotes" Evolutionary Biology, BIOL152 CSU Chico
| Question | Answer |
|---|---|
| biofilm | a complex communtity of different species of bacteria |
| peptidoglycan | carbohydrate polymers linked together by peptide cross-bridges. these often make up bacterial cell walls |
| pseudomurein | similar to peptoglycan in structure and function |
| gram stain | staining ptocess to identify between two types of bacteria |
| gram positive | has a thicker peptidoglycan wall |
| gram negative | has less peptidoglycan |
| lipopolysaccharide | lipids with polysaccharides attached |
| capsule | surrounds the other cell wall layers, gelatinous material |
| flagellin | the material flagella are made of |
| pili | hair like structures that occur on the cells of gram negative prokaryotes |
| endospores | a thick wall around their genome and cytoplasm in order to go dormant and survive extreme stress |
| nucleoid region | single double-stranded ring of DNA that is highly condensed to form a visible region of the cell |
| conjugation | gene transfer via cell-to-cell contact |
| transjuction | gene transfer by virus |
| transformation | recieves genes directly from environment |
| F-plasmid | independant genetic entity that uses cellular machinery for replication |
| Hfr Cell | high frequency of recombination; a cell with an integrated F Plasmid |
| generalized transduction | virtually any gene can be transferred |
| specialized transduction | only a few genes are transferred |
| R Plasmids | plasmids with antibiotic resistance genes |
| photoautotrophs | photosynthesis; use sunlight energy to build organic molecules from carbon dioxide |
| cyanobacteria | bacteria that use alpha chlorophyll as the key light capturing pigment |
| chemolithoautotrophs | ontain energy by oxidizing inorganic substances |
| nitrification | oxidize ammonia or nitrite to obtain energy producing the nitrate that plants get from the ground |
| photoheterotrophs | light for energy and organic molecules for carbon |
| chemoheterotrophs | majority prokaryotes; get energy and carbon form organic molecules |
| MDR strains | Multi-drug resistant strains |