Question

Many cancer-fighting drugs work by disrupting the cell cycle. If a drug works

by disrupting mitosis, which cells are most likely to be affected?
A. Red blood cells, which cannot divide
B. Actively dividing cells
C. Brain cells, which rarely divide
D. Cells in G0phase

Answer 1

B

Step-by-step explanation:

The cell cycle goes from the resting phase, through active growing phases, and then to mitosis (division). The ability of these pharmaceuticals to kill cancer cells depends on its ability to halt cell division. Usually, cancer drugs work by damaging the RNA or DNA that tells the cell how to copy itself in division.

This means the cells most likely to be affected are the ones that frequently divide, or actively dividing cells.