1. Adenosine Triphosphate (ATP) “universal energy molecule” It’s why we eat. Structure –Adenine, a N base –Ribose, a 5 C sugar –Chain of 3 phosphates Video: Intro. to ATP

2. How does ATP work? A phosphate is transferred to another molecule iP transfer is enzyme controlled Phosphorylated molecule becomes more reactive

4. How does ATP work? Make substrates more reactive. Make uphill, building reactions a bit more feasible Exergonic hydrolysis of iP is coupled to endergonic process.

5. Regeneration of ATP Amount of ATP in any cell at any moment is surprisingly small Average bacteria cell, < 5 million, only enough to sustain activity for a second or two. Human body has enough ATP “on hand” to last about 20 seconds. ATP supplies must be continually replenished (that’s why we eat, and breathe)! Video – How cyanide disrupts ATP synthesis

6. Cellular Respiration Process by which cells extract energy from food Literally it’s about using bond energy (electrons) to regenerate ATP May be anaerobic or aerobic

7. C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O

8. Adenosine Triphosphate (ATP) “universal energy molecule” It’s why we eat. Structure –Adenine, a N base –Ribose, a 5 C sugar –Chain of 3 phosphates Video: more details on ATP