Bcz of these reasons ATP called energy currency of the cell;
Universal use - ATP is used by all cells across organisms, from bacteria to humans, for energy transfer in almost every metabolic process.
Immediate energy - It provides energy instantly when hydrolyzed to ADP and phosphate (ATP → ADP + Pi), releasing about 7.3 kcal/mol under standard conditions.
Couples reactions - ATP drives endergonic (energy-requiring) reactions by coupling its hydrolysis with them, making them proceed.
Regenerable molecule - ATP can be rapidly synthesized again from ADP by processes like respiration or photosynthesis, maintaining a cycle.
Energy transport - It transports energy from energy-producing pathways (like glycolysis, Krebs cycle) to energy-consuming pathways (like muscle contraction, biosynthesis).
Stable yet reactive - Its triphosphate group holds high-energy bonds—unstable enough to break easily, but stable enough to be stored briefly.
Central molecule - ATP links catabolism (breaking molecules for energy) and anabolism (building molecules), acting as the cell’s economic medium for energy exchange.
