Some chemotherapy drugs act by attaching themselves to the growing strand of a DNA molecule, thus preventing its replication. Cells on which phase of the cell cycle would be affected by this drug?
| Cells that never divide, that are in G0 |
| Cells that havenÕt started the S phase and are still on G1 |
| Cells that completed DNA replication and are on G2 |
| Cells currently undergoing mitosis |
| Cells currently on the S phase |