<prompt> During which phase of cell cycle the cellular Content of DNA is doubledMitotic phaseG1phaseG2 phaseSphase  <response>: Ref Robbins 8e p86; 7e p90; 9e p25 Double the DNA The S-phase poion of interphase is when the DNA content of a cell increases. Ordinarily, a cell has one set of chromosomes, which are threadlike structures that contain the cells DNA. During the G1 phase, each chromosome contains one molecule of DNA. 