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  4. Cytoskeleton is made up of

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Q. Cytoskeleton is made up of

AIPMTAIPMT 2009Cell : The Unit of Life

Solution:

The ability of eukaryotic cells to adopt a variety of shapes and to carry out coordinated and directed movements depends on the cytoskeleton. The cytoskeleton extends througout the cytoplasm and is a complex network of three types of protein filaments: microtubules, microfilaments (or actinfilaments) and intermediate filaments (IFs). The main proteins that are present in the cytoskeleton are tubulin (in the microtubules), actin, myosin, tropomyosin and other (in the microfilaments) and keratins, vimentin, desmin,lamin and other (in intermediate filaments).