Final answer:
The proteins that form the nuclear lamina are a meshwork of intermediate filaments composed of lamins. They provide structural support to the nucleus and polymerize by addition of lamin monomers to the (+) end of the filament. They do not depolymerize when the bound nucleotide is hydrolyzed.
Step-by-step explanation:
The proteins that form the nuclear lamina are a meshwork of intermediate filaments mainly composed of lamins. They provide structural support to the nucleus. The nuclear lamina does not depolymerize when the bound nucleotide is hydrolyzed; its assembly and disassembly are regulated by phosphorylation and dephosphorylation of lamins.
Lamins are not anchored to the MTOC (microtubule organizing center) near the nucleus; they are anchored to the inner nuclear membrane. The motor protein myosin is not involved in transporting vesicles into the nucleus; microtubule motor proteins such as dynein and kinesin are responsible for the movement of vesicles and organelles within the cell.
The nuclear lamina polymerizes by the addition of lamin monomers to the (+) end of the filament. The filaments are composed of multiple strands of polymerized subunits lacking any bound nucleotide. They form the nuclear lamina and also play a role in cell motility and structural support.