The molecule that releases a form of energy that can be used directly by cells is ATP (adenosine triphosphate).

Here's why:

* ATP is the energy currency of cells: It's like a small, portable battery that stores and releases energy on demand.

* Breaking the bond: The energy stored in ATP is released when a phosphate group is removed from the molecule, converting ATP to ADP (adenosine diphosphate). This process is called hydrolysis.

* Cellular processes: This released energy is then used to power various cellular processes, including:

* Muscle contraction

* Nerve impulse transmission

* Active transport of molecules across cell membranes

* Synthesis of proteins and other molecules

Let me know if you'd like to learn more about ATP or its role in cellular processes!