BIO1140 Study Group #3 Answer Key

BIO1140 Study Group #3 Answer Key - BIO1140 Study Group#3...

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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, Microfilaments, 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.Protofilament 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
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Assembly • Dimer: central rod form coiled coil • Tetramer: staggered antiparallel• Protofilament: tetramers assemble end to end • Filament: 8 interwound protofilament 3. What is the name of the proteins that control the assembly/dissembly of actin
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