Here's why:
* ATP is the primary energy currency of cells. It's like a small, rechargeable battery that cells use to power their activities.
* Cellular respiration breaks down glucose (a sugar) to release energy.
* This energy is used to add a phosphate group to ADP (adenosine diphosphate), creating ATP. This process is called phosphorylation.
* When cells need energy, they break down ATP back into ADP, releasing the stored energy.
So, while cellular respiration involves many steps and molecules, the final outcome is the production of ATP, which then fuels all the cell's vital functions.
