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Cell biology focuses on examining the composition and operations of cells, which are the fundamental building blocks of life. To comprehend biological systems, researchers must uncover the foundational rules governing cellular architecture, activities, and reproduction. Key inquiries include cellular growth and division processes, the formation of new cellular components, and how cells continuously regenerate their parts during an organism's lifespan. Additional areas of exploration involve cellular communication through signaling pathways and how these messages affect cellular operations and responses. Investigations into human diseases often require analyzing how normal cellular functions become disrupted. Caltech provides an exceptional environment for tackling the most urgent challenges in contemporary cell biology research.