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| organelle | specialized structure that preforms important cellular functions within an eukaryotic cell
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| cytoplasm | material inside the cell membrane- not including the nucleus
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| nuclear envelope | layer of two membranes that surrounds the nucleus of a cell
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| chromatin | granular material visible within the nucleus ; consists of DNA tightly coiled around proteins
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| chromosome | threadlike structure within the nucleus containing the genetic info that has passed from one generation of cells to the next
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| nucleolus | small dense region within most nuclei in which assembly of proteins begin
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| ribosome | small particle on the cell in which proteins are assembled made of RNA and proteins
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| endoplasmic reticulum | internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified
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| golgi apparatus | stack of membranes in the cell that modifies, sorts, and packages proteins from the ER
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| lysosome | cell organelle filled with enzymes needed to break down certain materials in a cell
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| vacuole | cell organelle that stores materials such as water, salts, proteins, and carbohydrates
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| mitochondrion | cell organelle that convertsthe chemical energy stored in food into compounds that are more convenient fort he cell to use
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| chloroplast | organelle found in cells of plants and some other organisms capture the energy from sunlight and converts into chemical energy
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| cytoskeleton | network of proteins filaments within some cells that help maintain its shape and is involved in many forms of cell movement
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| centriole | one of two tiny structures located in the cytoplam of an animal near the nuclear envelope
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