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maintains cell shape; moves cell parts; helps cells move; found in plant and animal cells
threadlike structures made up of actin; form extensive networks in cells; produce a tough flexible framework that supports cell
hollow structures made up of proteins known as tubulins; play critical roles in maintaining cell shape; form a structure known as the mitotic spindle, which helps to separate chromosomes
modifies, sorts, and packages proteins and lipids for storage or transport out of the cell; found in plant and animal cells
regulates materials entering and leaving cell; protects and supports cell; found in both prokaryotes and eukaryotes
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