The molecule known as the universal energy source of the cell is adenosine triphosphate (ATP).

Here's why:

* Energy Currency: ATP is often called the "energy currency" of the cell because it stores and releases energy in a form that can be readily used by cells to power their functions.

* Chemical Bonds: The energy is stored in the high-energy phosphate bonds within the ATP molecule. When these bonds are broken, energy is released.

* Cellular Processes: ATP powers a wide variety of cellular processes, including:

* Muscle contraction

* Nerve impulse transmission

* Protein synthesis

* Active transport

* Cellular signaling

Let me know if you have any other questions!