In the following points, I have summarized Lac operon in Ecoli. I need to check if this is on the right track? and where does 'cleavage of disaccharides' fit into this picture?
Lactose is a disaccharide and the bacteria need specific genes to manage catabolism
1) The lacl promotor gene synthesis the repressor protein which binds to the operator gene stopping the RNA polymerase from coding the lac operon genes
2)But when lactose is present, it needs the specific genes to catabolise lactose
3) So, When allolactose (a derivative of lactose)is present, it binds to the repressor protein, the repressor releases from the operator gene
4) This allows the RNA polymerase can attach to the DNA control region
5) And drive down the operon for transcription and induction of the enzyme lacZ(beta-galactosidase) lacY and lacA which breaks lactose down into glucose and galactose
6) When the lactose is all gone, the repressor returns to the operator in a feedback loop system
