John E. Walker — English Scientist born on January 07, 1941,
Sir John Ernest Walker is an English chemist who won the Nobel Prize in Chemistry in 1997. As of 2015 Walker is Emeritus Director and Professor at the MRC Mitochondrial Biology Unit in Cambridge, and a Fellow of Sidney Sussex College, Cambridge... (wikipedia)
Biological energy comes from the sun. Light energy harvested by photosynthesis in chloroplasts and phototropic bacteria becomes stored in carbohydrates and fats. This stored energy can be released by oxidative metabolism in the form of adenosine triphosphate (ATP) and used as fuel for other biological processes.
