The molecule known as the energy currency of the cell is adenosine triphosphate (ATP). ATP is a nucleotide that stores and transports chemical energy within cells, playing a crucial role in various biological processes. Cells produce ATP through cellular respiration, primarily in the mitochondria, where glucose is metabolized. The energy released from the hydrolysis of ATP can drive cellular activities, including muscle contraction, protein synthesis, and various metabolic pathways, making it essential for maintaining life and supporting cellular function.