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SLS Bio12 Cell Structure MM

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Term
Definition
Cell Membrane   Composed of a phospholipid bilayer, controls movement of substances in and out of the cell  
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Cell Wall   Structure which surrounds a plant, prostitan, fungal, or bacterial cell and maintains the cell's shape and rigidity  
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Cellular Respiration   Metabolic reactions that use the energy primarily from carbohydrate but also fatty acid or amino acid breakdown t produce ATP molecules  
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Chloroplast   Membranous organelle that contains chlorophyll (green pigment which captures solar energy during photosynthesis) and is the site of photosynthesis  
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Chromatin   Network of fibrils consisting of DNA and associated proteins observed within a nucleus that is not dividing  
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Chromosome   Rod-like structure in the nucleus seen during cell division, contains the hereditary units or genes  
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Cristae   Short, finger-like projections formed by the folding of the inner membrane of mitochondria  
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Cytoplasm   Contents of a cell between the nucleus and the plasma membrane that contains the organelles  
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Cytoskeleton   Internal framework of the cell consisting of microtubules, actin filaments and intermediate filaments  
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Golgi Bodies   Organelle, consisting of flattened saccules and also vesicles, that processes, packages and distributes molecules about or from the cell  
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Lysosome   Membrane-bounded vesicle that contains hydrolytic enzymes for digesting macromolecules  
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Matrix   Unstructured semifluid substance that fills the space between cells in connective tissues or inside organelles  
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Mitochondria   Membrane bounded organelle in which ATP molecules are produced during the process of cellular respiration  
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Nuclear Envelope   Double membrane that surrounds the nucleus and is continuous with the endoplasmic reticulum  
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Nuclear Pore   Opening in the nuclear envelope that permits the passage of proteins into the nucleus and ribosomal subunits out of the nucleus  
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Nucleolus   Dark-staining, spherical body in the nucleus that produces ribosomal subunits  
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Nucleus   Membrane-bounded organelle within a eukaryotic cell that contains chromosomes and controls the structure and function of the cell  
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Organelle   Small, often membranous structure in the cytoplasm, having a specific structure and function  
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Polysome   a cluster of ribosomes held together by a strand of messenger RNA  
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Ribosome   RNA and protein in two subunits, site of protein synthesis in the cytoplasm  
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Rough ER   Has attached ribosomes, site of protein synthesis, packages proteins in a vesicle and sends to golgi body  
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Smooth ER   No attached ribosomes, makes lipids and steroids, detoxifies.  
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Vacuole   Membrane-bounded sac that holds fluid and a variety of other substances  
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Vesicle   Small, membrane-bounded sac that stores substances within a cell  
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