What is the meaning of operon concept in molecular biology?
Answers
platelets are tiny fragments at injury these realese enzyme thromboplastin which causes coagulation of blood to prevent ezcessive bleeding
THE OPERON CONCEPT
✏Operon concept states that each metabolic reaction is controlled by a set of genes.
✏Each operon consist of a group of genes coding for enzyme involved in a particular metabolism pathway.
✏A metabolic pathway is regulated by as a unit.
✏ When E.coli cultured in a medium devoid of lactose the enzymes for lactose breakdown are not required.
✏ When E.coli is cultured in medium containing lactose, E.coli needs enzymes for the breakdown of lactose, so the lac operon is switched on.
✏ The promoter gene is a gene which marks the site at which transcription of mRNA starts.
✏ The promoter gene initiates transcription and all the three structural genes synthesis three mRNAs to produce enzymes.