ATP

ATP, or adenosine triphosphate, is often referred to as the "energy currency" of cells. It is a small molecule that stores and provides energy for various biological processes. When cells need energy for activities like muscle contraction, nerve impulse transmission, or biochemical reactions, they break down ATP. This release of energy powers these processes, enabling life functions. ATP is continuously regenerated in cells, primarily through cellular respiration, where nutrients are converted into energy. Thus, ATP plays a crucial role in sustaining life by powering the activities necessary for growth, movement, and maintenance in living organisms.