Final answer:
If nuclear lamins cannot be phosphorylated, the cell cannot c. disassemble its nuclear lamina at prometaphase, which is critical for the progression of mitosis.
Step-by-step explanation:
If a cell is in the M-phase and possesses nuclear lamins that cannot be phosphorylated, the cell will be unable to c. disassemble its nuclear lamina at prometaphase.
Nuclear lamina phosphorylation is vital for lamina disassembly, which in turn allows the nuclear envelope to fragment and the chromosomes to become accessible to the mitotic machinery.
During prophase, the nuclear envelope starts to dissociate into small vesicles, and this process needs to continue into prometaphase for the mitotic spindle to properly attach to the chromosomes.
Without phosphorylation of the nuclear lamins, this disassembly cannot occur, hindering the progression of division.