The Obvious Advantage of the Lactose Operon System Is That

question 16

Multiple Choice

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