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Cell Wall
- allways present
- composed of peptidoglycan
- provides physical protection
- maintains cell shaper
- prevents bursting in hypotonic environment
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Plasma Membrane
- thin layer mainly composed of phospholipids pushed up against inside of the cell wall
- provides selectively permeable barrier between homeostatically controlled interioir and fluctuating exterioir environments
- controls entry and exit of substances
- can pump substances in our out (Active transport)
- Homeostatic - The ability or tendency of an organism or cell to maintain internal equilibrium by adjusting its physiological processes.
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Flagella
- structures protruding from the cell
- corkscrew shape
- base embedded in cell wall
- rotated to propel
- solid and inflexible
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Cytoplasm
- fluid filling the space inside plasma membrane
- water with many dissolved substances
- contains many enzymes
- contains ribosomes
- carries out the chemical reactions of metabolism
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Ribosomes
- smaller granular structures (70S)
- sites of protein synthesis
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Nucleoid
- region in cytoplasm contain the genetic material
- DNA is circular and naked (1 molecule)
- Nucleoid stained less densely because there are fewer ribosomes in it and less protein
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