Escherichia Coli BacteriumE. coli is a bacterium. That is a crude cell, it is not a virusbecause viruses are protein containers with DNA cores or RNA cores.
E. Coli and the BacteriophageWhat it looks like in real life
The Structure Of a Virus Viruses are composed of a core of nucleic acid The Nucleic acid core is surrounded by a protein coat called a capsid The Nucleic core is either made up of DNA or RNA but never both
Vaccines► Viruses grown on chicken embryos are attenuated vaccines► Another type of vaccine is made by heat killing the virus
Retrovirus Change DNA into RNA. Example of a Retrovirus is HIV
A typical, "minimal" retrovirusconsists of:•an outer envelope whichwas derived from the plasmamembrane of its host•many copies of an envelopeprotein embedded in the lipidbilayer of its envelope•a capsid; a protein shellcontaining•two molecules of RNA and•molecules of the enzymereverse transcriptase
Prokaryotes Cells that do not have a nucleus Exist almost every where on earth Grow in numbers so great you can see them with the unaided eye Are placed in either the Eubacteria or the Archebacteria Kingdoms Make up the smaller of the two kingdoms
EubacteriaMake up the larger ofthe two prokaryotekingdomsGenerally aresurrounded by a cellwall composed ofcomplexcarbohydrates
Cyanobacteria Photosynthetic bacterium Bluish-greenish color Contain membranes that carry out the process of photosynthesis Do not contain the same type of chloroplasts as plants do This bluish-greenish algae can be found nearly everywhere on earth. Can survive in extremely hot environments and even extremely cold environment
Archaebacteria Lack important carbohydrate found in cell walls Have different lipids in their cell membrane Different types of ribosomes Very different gene sequences Archaebacteria can live in extremely harsh environments They do not require oxygen and can live in extremely salty environments as well as extremely hot environments.
Cellular Walls Chemical nature of a cell wall can be determined by Gram Staining By finding out what color the cell produces when it is gram stained you can figure out the type of carbohydrates in the cell wall
Movement• Flagella ~ Tail like structure the whips around to propel the bacterium• Cillia ~ Miniature flagella surround the cell that help to “swim”• Non motile ~ Sticky cillia like structures that keep the bacterium from moving
Cellular organism copies it’s genetic information then splits intotwo identical daughter cells
Conjugation A type of Bacteria Sex Two organism swap genetic information, that contains the information such as a resistance to penicillin
Spore Formation: Endospore A type of dormant cell Exhibit no signs of life Highly resistant to environmental stresses such as: -High temperatures -Irradiation -Strong acids -Disinfectants Endospores are formed by vegetative cells in response to environmental signals that indicate a limiting factor for vegetative growth, such as exhaustion of an essential nutrient.
Symbiosis Close relationship between to species in which at least one species benefits from the other Live together for LIFE
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