The obvious advantage of the lactose operon is

that
a. it allows bacteria to survive in the presence
of lactose.
b. lactose-metabolizing enzymes need not be
made when lactose is not present.
c. it enables bacteria to make lactose only in
the presence of the proper enzymes.
d. it negates the need for milk in the diet of
adult humans.
e. it enables glucose to substitute for lactose
in the diet of lactose intolerant persons


B

Biology & Microbiology

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