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Editor(s): Nick Bisceglia |. Subscribe. Cell biology is the study of cell structure and function, and it revolves around the concept that the cell is the fundamental unit of life. Focusing on the cell permits a detailed understanding of the tissues and organisms that cells compose.
The cell is the lowest level of structure that is capable of performing all the activities of life. 1  For example, the ability of cells to divide is the basis of all reproduction and the basis of growth and repair of multicellular organisms. 2  Understanding how cells work is a major research focus of modern biology.