Jacques Lucien Monod ( Paris , 9 February 1910 â `` Paris , 31 May 1976 ) was an French biologist . He won the Nobel Prize in Physiology or Medicine in 1965 for his discoveries about the genetic control of enzyme and virus synthesis which he shared with FranÃ ois Jacob and Andre Lwoff . Jacques Lucien Monod ( February 9 , 1910 â `` May 31 , 1976 ) was a French biologist who was awarded a Nobel Prize in Physiology or Medicine in 1965 , sharing it with FranÃ ois Jacob and Andre Lwoff `` for their discoveries concerning genetic control of enzyme and virus synthesis '' .