What is François Jacob?
{{Infobox scientist |name = François Jacob |box_width = |image = François Jacob nobel.jpg |image_width = |caption = |birth_date = {{Birth date|1920|6|17|df=yes}} |birth_place = [[Nancy, Meurthe et Moselle|Nancy]], [[France]] |death_date = {{Death date and age|2013|4|19|1920|6|17|df=yes}}<ref>{{cite web |url=http://www.rawstory.com/rs/2013/04/21/nobel-winning-biologist-francois-jacob-dies-at-92/ |title=Nobel-winning biologist Francois Jacob dies at 92 |publisher=The Raw Story |accessdate=2013-04-22 |archive-date=2014-09-09 |archive-url=https://web.archive.org/web/20140909090851/http://www.rawstory.com/rs/2013/04/21/nobel-winning-biologist-francois-jacob-dies-at-92/ |url-status=dead }}</ref> |death_place = |residence = |citizenship = [[France|French]] |nationality = |ethnicity = |field = |work_institutions = |alma_mater = |doctoral_advisor = |doctoral_students = |known_for = [[Operon]] |author_abbrev_bot = |author_abbrev_zoo = |influences = |influenced = |prizes = 1965 [[Nobel Prize in Physiology or Medicine]] |footnotes = |signature = }} '''François Jacob''' (17 June 1920 &ndash; 19 April 2013) was a [[France|French]] [[biologist]]. He shared the 1965 [[Nobel Prize in Physiology or Medicine]] with [[Jacques Monod]] and [[André Lwoff]]. Jacob and Monod discovered a fundamental [[control system]] in [[cell]]s. [[Enzyme]] levels in all cells is regulated by [[feedback]] on [[Transcription (genetics)|transcription]]. Like his colleague Monod, Jacob was an almost lifelong [[atheist]]. He was also of [[Jewish]] descent.<ref>[http://www.nndb.com/people/157/000129767/ Francois Jacob -- NNDB]</ref><ref>Jacob, Francois 1988. ''The statue within: an autobiography''. Translated from the 1987 French edition by Franklin Philip. Basic Books, New York. {{ISBN|9780465082230}}; new edition: {{ISBN|9780879694760}} pp 20-57. Quotes fro