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4. __Long Arms_________. Most eukaryotic cells spend most of their time in interphase. For example, human skin cells, which divide about once a day, spend roughly 22 hours in interphase. About 90 percent of cells are in interphase. Some cells, such as nerve cells, can stay in interphase for decades.
The Cell Cycle. The life span of a eukaryotic cell is called the cell cycle. A cell spends the bulk of the cell cycle in interphase. During interphase, the cell grows (G1), replicates its DNA through DNA synthesis (S) and grows again (G2) until it is ready to divide.