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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.
A cell does most of its work in G1. That is, most cells spend their time in G1 performing whatever is required. If the cell is a liver cell it spends most of its time metabolizing materials while in G1. If the cell is a macrophage it spends most of its time in G1 eating any invading organisms.