Cells are the fundamental units of life. A thorough understanding of the structure, function, and behavior of cells provides a broad insight into how life works. In this course, the basic genetic mechanisms, internal organization, growth, and differentiation of a eukaryotic cell are discussed. Fundamental concepts on the (1) structure and regulatory function of biomembranes, (2) intracellular protein sorting and vesicular trafficking, (3) energy conversion in the mitochondrion and chloroplast; (4) cell signaling, (5) cytoskeleton; (6) flow of genetic information; (7) cell cycle and death, and (8) cells in their social context are emphasized.