Question

In cell division, the cell will not enter ____ phase if there is damage too the DNA and the cell will instead stop to be repaired.

Answer 1

The cell will not enter the S phase of cell division if there is DNA damage, and will instead stop for repair. The G2 checkpoint and p53 protein ensure DNA integrity before proceeding, and apoptosis occurs if repair is not possible.

Step-by-step explanation:

In cell division, the cell will not enter the S phase if there is damage to the DNA and the cell will instead stop to be repaired. The G2 checkpoint is responsible for ensuring that all the chromosomes have been replicated and that the replicated DNA is not damaged. Should the checkpoint mechanisms detect problems with the DNA, the cell cycle is halted. The protein p53 plays a crucial role here; it arrests the cell cycle to allow for DNA repair. If the damage is irreparable, the cell will undergo apoptosis, which is a programmed cell death mechanism to prevent the proliferation of damaged cells that could lead to cancer.