Final answer:
The statement is true; the nuclear lamina disassembles during prophase of mitosis and re-forms during telophase, facilitating chromosome segregation and the re-establishment of the nucleus in each daughter cell.
Step-by-step explanation:
The statement that the nuclear lamina disassembles and re-forms at each cell division is true. During the process of mitosis, the nucleus undergoes significant changes. The nuclear envelope, which includes the nuclear lamina, a dense fibrillar network that provides structural support to the nucleus, disassembles during prophase
. This allows the chromosomes to be appropriately segregated by the mitotic spindle. After the sister chromatids have been separated and moved to opposite poles of the cell during anaphase, the nuclear envelope and lamina re-form around the separated chromosomes to create two new nuclei during telophase.
The kinetochore becomes attached to the mitotic spindle and the sister chromatids separate after aligning at the metaphase plate, leading to the re-formation of the nucleus and division of the cell into two. The cohesin proteins, which hold the sister chromatids together, break down to allow this separation. Finally, as cells finish mitosis and commence cytokinesis, the nuclear envelope is reassembled, completing the division cycle.