A nucleotide triphosphate (NTP) is a molecule that consists of a nitrogenous base, a sugar, and three phosphate groups. NTPs are essential for various biological processes, including the synthesis of nucleic acids like DNA and RNA. The most common NTPs are adenosine triphosphate (ATP), guanosine triphosphate (GTP), cytidine triphosphate (CTP), and uridine triphosphate (UTP). NTPs serve as energy carriers in cells, providing the energy needed for biochemical reactions. When one of the phosphate groups is removed through hydrolysis, energy is released, which can be harnessed for cellular activities. This process is crucial for metabolism, signaling, and the overall functioning of living organisms.