[estimator7292]

I have always been super annoyed by the abstraction that ATP is a magical tiny battery that transports "energy" in some nonspecific way and that cells just hand-wave absorb that magic energy.

I learned recently that the actual mechanism of the energy transfer is one of the most interesting parts of molecular biology.

ATP doesn't just store chemical energy. ATP synthase constructs the molecules by literally mashing the two halves together and mechanically twisting them. ATP can later slot into proteins, releasing that energy by mechanically moving parts of a molecular machine. It can also be split for simple heat and participate in other chemical reactions more directly.

But I find it absolutely fascinating that ATP operates as a mechanical battery. Storing actual mechanical motion in a chemical bond that can be reversed to recover the motion and transform it into work. Molecular machines are one of the most incredible things in the universe.