Question

a cells nucleus will divide during mitosis. what must happen before it can divide?
the cell membrane must become selectively permeable
the ribosome must leave the cell
the cell must make a copy of its dna
the cell must make a copy of all its phospholipids

question 4
10 pts
what happens in mitosis?
cell divides its cytoplasm
cell copies its dna
cell divides its dna
cell creates two cells with different dna

Explanation:

For the first question:

• Before mitosis, during the S - phase of the cell cycle, DNA replication occurs. This ensures that each daughter cell will receive a complete set of genetic information.
• The cell membrane is always selectively permeable. Ribosomes are essential for protein synthesis and do not leave the cell before mitosis. Making a copy of all phospholipids is not a key pre - mitotic event compared to DNA replication.

For the second question:

• Mitosis is the process of nuclear division. During mitosis, the replicated DNA (sister chromatids) are separated and distributed equally to two daughter nuclei.
• Cytoplasmic division occurs during cytokinesis, which is separate from mitosis. DNA copying (replication) occurs before mitosis (in the S - phase). Mitosis results in two cells with the same DNA (assuming no mutations).

Answer:

For the first question: the cell must make a copy of its DNA.
For the second question: Cell divides its DNA.