What is the main energy currency of all cells in the human body?

The main energy currency of all cells in the human body is adenosine triphosphate, commonly known as ATP. ATP is critical because it provides the energy required for many cellular processes, including muscle contraction, nerve transmission, and biochemical synthesis.

When energy is needed, ATP is converted to adenosine diphosphate (ADP) through the release of a phosphate group, a process that provides the necessary energy for cellular functions. The constant recycling of ATP to ADP and back to ATP allows cells to maintain energy balance and carry out their activities efficiently.

While ADP, AMP (adenosine monophosphate), and GTP (guanosine triphosphate) play various roles in cellular metabolism and signaling, they do not function as the primary energy currency like ATP does. ATP's high-energy phosphate bonds are what make it particularly useful as an immediate energy source, distinguishing it from other nucleotides that support different biochemical pathways.