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worksheetKEY - Name Week 3 Worksheet Part 1 Which cellular...

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Name __________________________ Week 3 Worksheet Part 1 Which cellular structures or organelles are shown below? Complete the table on the next page. A B C D F G H (hint: low pH) I J K L E
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Name __________________________ Name Function A Plasma Membrane Membrane enclosing the cell. It acts as a selective barrier and regulates the cell ʼ s chemical composition. Controls what can and cannot enter or exit the cell. B Nucleus The chromosome containing organelle of the cell. Contains chromatin Other important structures: Nucleolus (remember LBL 1?) Nuclear envelope: Double membrane separating nucleus from cytoplasm. C Nuclear Pore Membrane complexes that span the nuclear envelope and allow transport of molecules in and out of nucleus. What must these molecules have? D Rough ER Portion of ER that has ribosomes bound to it. Site of transmembrane and secreted protein synthesis. Also important for membrane synthesis. E Ribosomes (bound and free) Complexes that make proteins. Bound make transmembrane and secretory proteins. Free make cytosolic proteins. Where are the ribosomes made? F Smooth ER Portion of ER without ribosomes. Important for lipid synthesize, detoxification, and storage of calcium G Golgi Organelle active in the modification, storage, and routing of proteins from the ER as well as synthesis of carbohydrates (polysaccharides) H Lysosome A membrane enclosed organelle containing hydrolytic enzymes found in the cytoplasm. Important for digestion of phagocytosed material.
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