Here's why:
* ATP is the primary energy currency of cells. It's like a tiny battery that stores and releases energy.
* Cells break down food (glucose) to generate ATP. This process is called cellular respiration.
* ATP powers many cellular processes, including:
* Muscle contraction
* Nerve impulse transmission
* Protein synthesis
* Active transport
* Cell division
While other molecules like glucose are used as fuel, ATP is the immediate, usable form of energy for cells.
