Biochemistry 3381A Study Guide - Quiz Guide: Microtubule Organizing Center, Spindle Apparatus, Atp Hydrolysis
27 May 2020
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Document Summary
The cytoskeleton is a network of fibers extending throughout the cytoplasm which is dynamic and adaptable. It organizes the structures and activities, anchoring many organelles. It is composed of 3 types of protein filaments: microfilaments (actin filaments) Helical polymer organized in linear bundles (8nm diameter) Mostly highly concentrated cortex membrane just beneath in the the plasma. Shape the cells surface and are necessary for whole-cell locomotion. Drive the pinching of one cell into two: microtubules. One end attached to a microtubule called (mtoc) organizing centrosome center. Determine the position of membrane- enclosed organelles. Form the mitotic spindle that segregates chromosomes during cell division: intermediate filaments. Interact with accessory proteins that regulate and link the filaments to other components. Support the cell and maintain its shape. Essential for rapid cell shape change and dynamics. Vesicles can travel along monorails provided by the cytoskeleton. The cytoskeleton forms stable, specialized cell-surface protrusions.
