AP BIOLOGY

Detailed explanation-1: -Therefore, the S phase is the most critical phase in the cell cycle. Many chemotherapeutic drugs mainly act on the S phase of cells.

Detailed explanation-2: -A mitotic inhibitor is a drug that inhibits mitosis, or cell division. These drugs disrupt microtubules, which are structures that pull the chromosomes apart when a cell divides.

Detailed explanation-3: -When cells lose their ability to regulate the cell cycle, they can divide at an accelerated rate and form a clump of cancer cells. This mass of cells is referred to as-a tumor an embryo a gland an organ.

Detailed explanation-4: -Because cancer cells divide much more often than most normal cells, chemotherapy is much more likely to kill them. Some drugs kill dividing cells by damaging the part of the cell’s control centre that makes it divide. Other drugs interrupt the chemical processes involved in cell division.