Question

_________: the cell cycle is halted at these points in the cell cycle if there is a problem that may prevent the cell from progressing through the cell cycle.

Answer 1

The cell cycle is halted at checkpoints if there are problems that may prevent the cell from progressing. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase. At each checkpoint, different molecules provide stop or go signals depending on certain conditions within the cell.

Step-by-step explanation:

The cell cycle is halted at specific points called checkpoints if there is a problem that may prevent the cell from progressing through the cell cycle. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase. At each of these checkpoints, different molecules provide the stop or go signals, depending on certain conditions within the cell. The most important role of the G2 checkpoint is to ensure that all of the chromosomes have been replicated and that the replicated DNA is not damaged. If problems with the DNA are detected, the cell cycle is halted, and the cell attempts to either complete DNA replication or repair the damaged DNA.