Checkpoint in Cell Division Process

Which of these checkpoints determines if cell division has occurred properly?

A. M checkpoint

B. G1 checkpoint

C. G2 checkpoint

Answer:

The correct answer is option A. "M checkpoint".

The M checkpoint is one of the controls of the cell cycle, which determines if cell division has occurred properly. This checkpoint is crucial for ensuring the accuracy of cell division and preventing any errors that may lead to genetic abnormalities.

During the M checkpoint, the cell checks if the sister chromatids are properly attached to the spindle microtubules at the centromere. This attachment is essential for the accurate segregation of genetic material during cell division.

If the M checkpoint detects any abnormalities or errors in the attachment of sister chromatids, it will prevent the cell from proceeding with further division until the issues are resolved. In this way, the M checkpoint acts as a quality control mechanism to safeguard the integrity of the cell division process.

Overall, the M checkpoint plays a crucial role in ensuring that cell division occurs accurately and efficiently, thereby maintaining the stability and function of the resulting daughter cells.