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Microtubules may work alone or join with other

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Microtubules may work alone, or join with other proteins to form more complex structures called cilia, flagella or centrioles. Image: Source Unknown From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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CYTOSKELETON: Centrioles & Centrosomes The ____________, also called the "microtubule organizing center", is an area in the cell where microtubles are produced. Within the cells of animals are a pair of ___________, made of nine sets of triplet microtubules. Microtubules > Centriole > Centrosome Images: Centriole Cross-section & Centriole-3D , Twooars; Micrograph of Centrioles , Christos Chinopoulos From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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_______ & __________ • External appendages from cell membrane. • Aid in locomotion of the cell or movement of materials near cell. • Motility > coordinated sliding movements of microtubules. • Both Prokaryotes & Eukaryotes can have external appendages, but are constructed differently. Eukaryotes may have flagella or cilia (components of cytoskeleton covered with plasma membrane). Prokaryotes may have flagella, endoflagella, fimbiae or pili (composed of protenaceous molecules and not covered with plasma membrane). Images: Cilia of the lung trachea epithilium , Charles Daghlian, Cilum Diagram & Flagellum Diagram , M. Ruiz; Sperm & Egg, Wiki From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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Ribosomes Q: What do they do? Q: What are they made of? Can be found alone in the cytoplasm, in groups called polyribosomes, or attached to the endoplasmic reticulum. Q: Eukaryotes? Prokaryotes? Both? Images: Ribosome translating protein , animation, Xvazquez; Ribosome Structure , Vossman From the Virtual Cell Biology Classroom on ScienceProfOnline.com Click here for animation of ribosome building a protein.
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Membrane-bound Organelles Eukaryotic cells have many organelles. Prokaryotes only have ribosomes, which are not bound by a membrane. Membrane-bound eukaryotic organelles organize functions within the cell. Image: Eukaryotic Cell Diagram , M. Ruiz From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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System of internal membranes within eukaryotic cells that divide the cell into compartments, or organelles. Transport system, for moving molecules through interior of cell, as well as interactive surfaces for lipid and protein synthesis. Membranes of the endomembrane system are made of a lipid bilayer, with proteins. The Endomembrane System consists of: 1. ________ 2. __________ ________ 3. ______ _______ 4. __________ 5. __________ 6. _________ ___________ Image: Endomembrane system diagram, M. Ruiz From the Virtual Cell Biology Classroom on ScienceProfOnline.com
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ENDOMEMBRANE SYSTEM ORGANELLES: Nucleus Nickname: Control Center Function: Separates the genetic material (DNA) from the rest of the cell. DNA, the genetic material, is a blueprint, or code for making proteins .
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