The creation of milk products such as cheeses and yogurts is dependent on the conversion by various anaerobic bacteria, including several Lactobacillus species, of lactose to glucose and galactose, ultimately producing lactic acid. These conversions are dependent on both permease and β-galactosidase as part of the lac operon. After selection for rapid fermentation for the production of yogurt, one Lactobacillus subspecies lost its ability to regulate lac operon expression [Lapierre, L., et al. (2002). J. Bacteriol. 184:928–935]. Would you consider it likely that in this subspecies the lac operon is on or off? What genetic events would likely contribute to the loss of regulation as described above?

Hello, everyone here. We have a question telling us. Lactose metabolism is accomplished by different enzymes that are produced by the different structural genes in the lac opteron. The structural gene, which encodes for beta galactose today's, is called We have a galaxy that does code for beta galactus stays. But let's see what the others code for two so lack Y is permeates and black A is trans a seed, a lace, and there is no black tea. So our answer here is a black Z. Thank you for watching. Bye!