Suppose you inoculate three flasks of minimal salts broth with E. coli. Flask A contains glucose. Flask B contains glucose and lactose. Flask C contains lactose. After a few hours of incubation, you test the flasks for the presence of B-galactosidase. Which flask(s) do you predict will have this enzyme?
A) A
B) B
C) C
D) A & B
E) B & C
Answer: C
Microbiology
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