In the atp cycle, a phosphate group is cut off of atp to form adp, absorbing energy. atp to form adp, releasing energy. adp to form atp, absorbing energy. adp to form atp, releasing energy.

ATP to form ADP, releasing energy

Explanation:

ATP stands for Adenosine triphosphate, an energy currency is synthesised by oxidative phosphorylation mitochondria and by substrate-level phosphorylation in the cytoplasm during glycolysis. It is a complex molecule composed of the nucleoside adenosine and a tail of three phosphates. On hydrolysis, the terminal phosphate to become adenosine diphosphate (ADP) and energy is released whcih is used to do cellular functions.  Thus, a phosphate group is cut off of ATP to form ADP, releasing energy is the correct option.

from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.