Question

what is the stage of mitosis where the centrioles move to opposite sides and the nuclear membrane disappears?
a anaphase
b metaphase
c prophase
d telophase

Explanation:

To determine the stage of mitosis where centrioles move to opposite sides and the nuclear membrane disappears, we analyze each stage:

• Anaphase: Sister chromatids separate and move to opposite poles. Centrioles have already moved earlier, and nuclear membrane disappearance is not the main event here.
• Metaphase: Chromosomes align at the equatorial plate. Centrioles are already at opposite poles, and nuclear membrane has already disappeared.
• Prophase: In prophase, centrioles migrate to opposite ends of the cell, and the nuclear membrane breaks down (disappears). This matches the described events.
• Telophase: Nuclear membranes reform, and the cell starts to divide. Centrioles do not move here, and nuclear membrane is reforming, not disappearing.

Answer:

c. Prophase