TASK 6: The cytoskeleton true / false Indicate whether the statements below are true or false. Justify the answers. 1. M

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TASK 6: The cytoskeleton true / false Indicate whether the
statements below are true or false. Justify the answers.
1. Mitosis is initiated by phosphorylation of the
microtubule
2. In interphase cells, the microtubule is located below the
plasma membrane
3. Tubulin polymerization usually starts on the centrosome
4. The cytotoxic drug colchinine prevents cell division by
breaking down the microtubule in the mitotic spindle apparatus.
5. The microtubule stabilizes axons and dendrites. The
microtubule is organized in both the axon and the dendrites with
the positive end away from the cell body
6. All three filament types, microtubule, actin filament and
intermediate filament are polarized filaments with one positive and
one negative end.
7. Keratins and vimentins cannot polymerize and form an
intermediate filament in an epithelial cell.
8. Phagocytic cells form "arms" around what is to be "eaten" and
these arms consist of actin filament which is polymerized.