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12 Cards in this Set
- Front
- Back
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Cell Envelope |
In bacteria and archaea all layers that bound the cell including cell membrane and surrounding structures |
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DNA gyrase |
a topoisomerase that introduces supercoils into circular DNA |
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FtsZ |
A prokaryotic protein, filamentous temperature sensitive protein z that assembles during cell division to form Z ring at site of future septum |
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Gas Vacuole |
A membrane that is permeable to gas bound each gas vesicle. The inflation and deflation of the vesicles provides buoyancy, allowing the bacterium to float at a desired depth in the water. |
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Magnetosome |
a specialized membrane bounded intracellular structure of some bacteria that contain iron crystals that function as magnets used to orient cell relative to earth's magnetic fields |
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polyphosphate |
salts or esters of polymeric oxyanions formed from tetrahedral PO4 (phosphate) structural units linked together by sharing oxygen atoms |
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Polyhydroxy butyric acid |
bacterial storage molecules, which accumulate in cells under nutritional stress. |
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Nucleoid |
in the cytoplasm of a prokaryotic, the region that contains the highly condensed chromosome and excludes ribosomes |
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plasmid |
independently replicating extrachromosomal DNA genetic element found in many prokaryotes that may carry Gene's that benefit under specific circumstances |
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polyribosome |
multiple ribosomes attached to and simultaneously translating mRNA |
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ribosome |
sphere-shaped structure within the cytoplasm of a cell that is composed of RNA and protein and is the site of protein synthesis |
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supercoiled |
over winding of double stranded DNA |
