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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.
Together, the G 1, S, and G 2 phases make up the period known as interphase. Cells typically spend far more time in interphase than they do in mitosis. Of the four phases, G 1 is most variable in terms of duration, although it is often the longest portion of the cell cycle (Figure 1).Figure 1: The eukaryotic cell cycle. Â© 2013 Nature Education All rights reserved.ells typically spend far more time in interphase than they do in mitosis. Of the four phases, G 1 is most variable in terms of duration, although it is often the longest portion of the cell cycle (Figure 1). Figure 1: The eukaryotic cell cycle. Â© 2013 Nature Education All rights reserved.