ATP
Definition
ATP (Adenosine Triphosphate) is the primary energy currency of all living cells. It consists of adenine, ribose sugar, and three phosphate groups. Energy is released when ATP is hydrolyzed to ADP (adenosine diphosphate) and inorganic phosphate. ATP is continuously recycled in cells.
Key Points for NEET
- 1Made of adenine + ribose + 3 phosphate groups
- 2Energy stored in high-energy phosphate bonds
- 3ATP → ADP + Pi releases about 7.3 kcal/mol
- 4Produced mainly in mitochondria
- 5Used for all cellular work: mechanical, chemical, transport
Example
Muscle contraction using ATP to power myosin movement along actin filaments
Asked in NEET
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