Simplify the following text for a Grade 6 native English-speaking person.
Original: FranÃ ois Jacob ( born June 17 , 1920 in Nancy , France ) is a French biologist who , together with Jacques Monod , originated the idea that control of enzyme levels in all cells occurs through feedback on transcription .
Simplified: FranÃ ois Jacob ( born 17 June 1920 in Nancy , France ) is a French biologist .