The obvious advantage of the lactose operon system is that ____.
A)lactose is not needed as energy for bacteria
B)lactose-metabolizing enzymes are only made when lactose is present
C)the bacteria will make lactose only in the presence of the proper enzymes
D)milk is not needed for the adult human diet
E)glucose can substitute for lactose in the diet of intolerant persons

Question

Quizplus · Accepted Answer

The lactose operon system allows for the regulation of lactose-metabolizing enzymes so that they are only produced when lactose is present. This allows bacteria to conserve energy and resources by only producing enzymes when they are needed, and prevents the production of unnecessary enzymes in the absence of lactose.

The Obvious Advantage of the Lactose Operon System Is That