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Moderate

Cell Cycle Regulation

APBIO-EGCY2P

If a cell in metaphase of mitosis is fused with a cell in the G$_1$ phase of the cell cycle, the second nucleus will also begin mitosis.

Which of the following is the MOST likely explanation for this behavior?

A

Since mitosis takes up most of the time in the cell cycle, it will dominate the newly created fused cell.

B

Molecules such as cyclins are in high concentration in the cytoplasm of a dividing cell and will signal the fused cell’s nucleus to undergo mitosis.

C

Spindle fibers from the first mitotic cell cannot distinguish between the chromosomes of the two nuclei.

D

The cell senses that it has too high of a surface area to volume ratio following fusion and begins division.