BISC 101 Lecture Notes - Lecture 4: G2 Phase, Hydrophile, Golgi Apparatus

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Bisc 101 lecture 4 a tour of the cell: part ii. Intermediate filaments: component of the cytoskeleton with fibers in a middle diameter range: protein subunits, one of several different proteins of the keratin family, ex: keratin: cells that make up your skin and line surfaces inside the body. Intermediate filament structure: fibrous proteins supercoiled into thicker cables. If one doublet slides, it transmits force to the rest of the axoneme. The cell wall in plants: cell wall: extracellular structure that distinguishes plant cells from animal cells since animals do not have a cell wall. Secondary cell walls: secondary cell wall: formed when a plant cell matures and stops growing, varies from cell to cell and correlates with the cell"s function, ex: cells in plant leaves have a wax or waterproof coating. Lignin: tough substance that forms a rigid network in wood.

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