Which Statement Is False About the Utilization of Lactose as a Carbon

question 37

Multiple Choice

Which statement is false about the utilization of lactose as a carbon source by E.coli?

• A)In the presence of both glucose and lactose,the enzymes necessary for lactose catabolism are produced only in limited amounts.
• B)Lactose is the inducer for the enzymes responsible for its own catabolism.
• C)In the absence of lactose,the repressor binds to a single site upstream of the lac genes.
• D)The catabolic enzymes are encoded in a three-gene operon controlled by a single promoter.