. "Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a stimulus indicating damage to its DNA from environmental insults or errors during metabolism." . . "response to DNA damage stimulus" . "cellular DNA damage response" . "cellular response to DNA damage stimulus" . "DNA damage response" . "response to genotoxic stress" . . . . . . . . . . . . . .