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Cells - Cells Wut Two Structural Grades of Cells Prokaryote...

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Cells Wut. Two Structural Grades of Cells: Prokaryote- bacterium 1. Basic Cell Parts Cell membranes Cytosol = cytoplasm (protein-water complex) Genetic material = DNA Ribosomes = RNA - protein complexes Proteins are made 2. 2 Grades of Cell Structure Prokaryotic vs. eukaryotic cells Eukaryotic cells They’re large. Contain structures consisting of internal membrane pockets = organelles (includes nucleus) DNA found in protein complexes (chromosomes) Include all multi-cellular organisms Prokaryotic cells Small No organelles DNA normally takes the form of protein-free loops Include all cells referred to as bacteria & similar cell types 3. Cell Membrane Basic composition Mostly composed of a modified lipid = phospho-lipid (see drawing in notebook) Phospholipid Bi-layer (text. Pg. 92-93) Include large numbers of proteins floating in the cell membrane (includes receptors) Membrane Proteins (see notebooks for illustrations) Basic Structure Glycoprotein Tight Junctions - serve as a Velcro like substance to keep cells together
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