Verified Solutions
Describe what happens to the nuclear membrane after prophase. - Answer It breaks
down.
Explain why it is necessary that the nuclear membrane disintegrates during mitosis. -
Answer It must be temporarily removed for the chromosomes to be divided into two
cells.
At what point during mitosis has the nuclear membrane reformed? - Answer Telophase
What is actually dividing during cytokinesis? - Answer Cytoplasm
Cellular division has two parts-mitosis is the division of the nucleus and cytokinesis is the
division of the cell into two new cells. Explain why mitosis has to come before
cytokinesis in the cell cycle. - Answer The contents of the nucleus must be duplicated
and the chromosomes must be correctly divided up before the actual cell can divide into
two new cells.
Why does the DNA must coil up into chromosome structures before it divides? - Answer
If they're long and thin, pieces of DNA can be lost. Certain pieces can be broken off.
Prophase - Answer Chromosomes become visible, each replicated chromosome is made
of two identical chromatids, spindle fibers begin to form and nuclear membrane begins
to disintegrate.
Metaphase - Answer Chromosomes line up in middle of the cell, spindle fibers attach to
replicated chromosome at their centers.