During Which Part of Mitosis Does the Nuclear Envelope Break

Question

During which part of mitosis does the nuclear envelope break down?
A) anaphase
B) metaphase
C) prophase
D) telophase

Accepted Answer

The nuclear envelope breaks down during prophase, which is the first stage of mitosis. The breakdown is necessary for the chromosomes to be able to move freely within the cell during the subsequent stages of mitosis.