CISE. 2 A cell only divides once during its lifetime. ENTER TRUE OR FALSE Cells spend most of their time in ENTER TRUE OR FALSE mitosis (dividing). All cells divide (go through the cell ENTER TRUE OR FALSE cycle) at the same rate. Cancer cells are regular cells (such as ENTER TRUE OR FALSE skin or liver cells) that are dividing uncontrollably. A cell must replicate its DNA prior to ENTER TRUE OR FALSE cell division, during the G1 phase. All cells come from preexisting cells. ENTER TRUE OR FALSE Mitosis results in gametes (sperm or egg cells). I ENTER TRUE OR FALSE Cells divide, but the cells themselves ENTER TRUE OR FALSE never increase in size or gain mass