Amutation in the bacterial regulatory gene that codes for the lac repressor creates a repressor that binds irreversibly to the lac operator. briefly explain what effect, if any, this would have on the bacterium’s metabolism of lactose.

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

if you know your abc's you should be able to get your answer or just use google

answer: b

coz red blood cells marrow and circulates the body for 120 days.