Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have 1½ times more DNA than G₁phase cells. The cells of this group are in A) the process of cytokinesis. B) S phase. C) M phase. D) the G₂phase of the cell cycle.

Question

Quizplus · Accepted Answer

Cells with 1½ times more DNA than cells in the G₁phase are likely in the S phase of the cell cycle, during which DNA replication occurs. During cytokinesis, the cell is dividing into two, so each resulting cell should have the same amount of DNA as the original cell. During M phase, the DNA is divided equally between the two daughter cells, so they should each have the same amount of DNA as the original cell. The G₂phase does not exist, so it cannot be the answer.

Scientists Isolate Cells in Various Phases of the Cell Cycle