How is ATP like change from a 100 bill?

ATP (adenosine triphosphate) is like a $100 bill in that it serves as a valuable energy currency in biological systems. Just as a $100 bill can be exchanged for goods and services, ATP can be converted into energy to fuel various cellular processes. Both are essential for facilitating actions—money for transactions and ATP for biochemical reactions. However, just as a $100 bill can be broken down into smaller denominations for specific purchases, ATP can be hydrolyzed into ADP and inorganic phosphate to release energy as needed.