ATP is the molecule used to power alomost everything that happens insidea a cell.?

Question

How does ATP give energy to the reactions it helps with?

Answer 1

ATP consists of adenosine and three phosphate groups (triphosphate). The phosphoryl groups, starting with that on AMP, are referred to as the alpha (α), beta (β), and gamma (γ) phosphates. ATP is extremely rich in chemical energy, in particular between the second and third phosphate groups. The net change in energy of the decomposition of ATP into ADP and an inorganic phosphate is -12 kcal / mole in vivo (inside of a living cell) and -7.3 kcal / mole in vitro (in laboratory conditions). This massive release in energy makes the decomposition of ATP extremely exergonic, and hence useful as a means for chemically storing energy.

ATP energy is released when hydrolysis of the phosphate-phosphate bonds is carried out. This energy can be used by a variety of enzymes, motor proteins, and transport proteins to carry out the work of the cell. Also, the hydrolysis yields free inorganic Pi and ADP, which can be broken down further to another Pi and AMP. ATP can also be broken down to AMP directly, with the formation of PPi. This last reaction has the advantage of being an effectively irreversible process in aqueous solution.

Answer 2

it has to do with the krebs cycle inside the mitochondria. basically, the ATP breaks to form ADP (adenosine diphosphate) and P. which releases energy.