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Component of the cytoskeleton; plays a role in the movement of the cell and its organelles; a protein filament in a sarcomere of a muscle, its movement shortens the sarcomere, yielding muscle contraction. |
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Prokaryotic organisms that are members of the domain of bacteria that are older. Scientists say that these were around before modern bacteria. |
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A rod-shaped bacterium; also a genus of bacteria |
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A cytoplasmic structure that is located at the base of--and may organize--cilia or flagella. |
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A form of glycoalyx that consists of a gelatinous layer; found in blue-green algae and some bacteria. |
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The smallest unit of life that displays all the properties of life; composed of cytoplasm surrounded by a plasma membrane. |
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In a prokaryotic cell, the portion composed of the plasma membrane, the cell wall, and the glycocalyx. |
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One of the major theories of Biology, which states that all organisms are made up of cells; cells are capable of self-reproduction and come only from preexisting cells. |
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Cellular structure that surrounds a plant, protistan, fungal, or bacterial cell and maintains the cell's shape and rigidity; composed of polysaccharides. |
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In a plant cell, a large, fluid-filled sack that stores metabolites. During growth, it enlarges, forcing the primary cell wall to expand, and the cell S.A. to Vol. ratio to increase. |
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Cell structure, existing in pairs, that occurs in the centrosome and may help organize a mitotic spindle for chromosome movement during animal cell division. |
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Central microtubule organizing center of cells. In animal cells, it contains two centrioles. |
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Short, hairlike projections from the plasma membrane, occuring usually in larger numbers. |
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A spherical shaped bacteria. |
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In a bacterium, elongated, hollow appendage used to transfer DNA into other cells. |
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Short, fingerlike projections formed by the folding of the inner membrane of mitochondria. |
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Photosynthetic bacterium that contains chlorophyll and releases oxygen; formerly called a blue-green alga. |
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Region of a cell between the nucleus, of the nucleoid region of a bacterium, and the plasma membrane; contains that organelles of the cell. |
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Internal framework of the cell, consisting of microtubules, actin filaments, and intermediate filaments. |
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Cellular system that consists of the nuclear envelope, E.R., golgi, and vesicles. |
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Endoplasmic Reticulum (E.R.) |
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Flagellum (pl., flagella) |
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