If a cell suffers damage to its dna while in s phase, how can this damage be repaired before the cell enters mitosis? write the terms on the left to the appropriate blanks on the right to complete the sentences. m phase s phase brca1 arrests chk2 mrad51 initiates g1 phase 1. various kinases can be activated by breaks in dna. one kinase, called atm, and/or a kinase calledphosphorylatesand p53. the activated p53 replication during theto facilitate dna repair. the activated brca1 protein, in conjunction with brca2,, and other nuclear proteins, is involved in repairing the dna.