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Unformatted text preview: BIO1140 Study Group #3 Answer Key 1. What are some of the important functions of the cytoskeleton? Functions include: The provision of structure and support (1) Intracellular transport (2) The positioning of organelles within the cell (4) The generation of force for cell movement Contributing to cell division Types: Intermediate Filaments, Micro¡laments, and Microtubules. IF: Mechanical strength in animal cells MF: Shape/support and motility (of cell and within cell) All eukaryotic cells Shape/support Cell cortex networks Microvilli bundles Adherens junctions 2. Describe the structure of an IF. What is the difference between: i. Dimer ii.Tetramer iii.Proto¡lament iv.Filament Structure: • α ‐ helical rod domain of about 310 ‐ 350 aa • Globular Head and Tail domains, variable size • Head and tail domains determine the specific functions Assembly • Dimer: central rod form coiled coil • Tetramer: staggered antiparallel• ProtoFlament: tetramers assemble end to end • ¡ilament: 8 interwound protoFlament 3. What is the name of the proteins that control the assembly/dissembly of actin 3....
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This note was uploaded on 03/30/2012 for the course SCIENCE BIO1140 taught by Professor Fenwick during the Spring '09 term at University of Ottawa.
- Spring '09
- cell biology