What is "when the endmost phosphate group is removed from atp?

When the endmost phosphate group is removed from ATP (Adenosine Triphosphate), it results in the conversion of ATP into ADP (Adenosine Diphosphate). This process is called hydrolysis, where the phosphate group is cleaved off with the help of water, releasing energy in the form of a phosphate bond.

This reaction is catalyzed by enzymes known as ATPases, which play a crucial role in cellular metabolism by breaking down ATP to release energy for various cellular processes. The energy released during ATP hydrolysis is used to drive various biological reactions, such as muscle contraction, cell division, and nerve signaling.

After the release of the phosphate group, ADP can further be converted into AMP (Adenosine Monophosphate) by the removal of another phosphate group, releasing more energy in the process. The continuous recycling of ATP and ADP within cells ensures a constant supply of energy for cellular functions.