Ans. Mitosis is regulated by a complex network of proteins and checkpoints that ensure that the process is carried out correctly. These checkpoints monitor the cell for DNA damage, ensure that the chromosomes are aligned properly, and check that the spindle fibers are attached correctly to the chromosomes. If any errors are detected, the cell cycle can be paused or halted to allow for repair or apoptosis (programmed cell death). Additionally, mitosis is regulated by a number of signaling pathways that respond to internal and external cues, such as growth factors or stress signals, to ensure that cell division occurs at the appropriate time and in the appropriate context.