If mammalian cells receive a go-ahead signal at the G₁ checkpoint, they will
A)move directly into telophase.
B)complete the cycle and divide.
C)exit the cycle and switch to a nondividing state.
D)show a drop in MPF concentration.
E)complete cytokinesis and form new cell walls.

Question

Quizplus · Accepted Answer

If mammalian cells receive a go-ahead signal at the G₁ checkpoint, they will complete the cell cycle and divide. The G₁ checkpoint is responsible for ensuring that the cell has enough energy and resources to begin DNA synthesis. Once that determination has been made, the cell will proceed with the rest of the cycle, including S phase (DNA synthesis), G₂ phase (preparation for mitosis), and mitosis itself, ultimately resulting in cell division.

If Mammalian Cells Receive a Go-Ahead Signal at the G₁