Multiple Choice
A compound known as X-gal is widely used in molecular biology research. When wild-type E. coli is grown on an agar plate containing X-gal, the bacterial colonies turn blue. In contrast, when lacZ mutants are grown on an agar plate containing X-gal, the bacterial colonies remain their normal white color. What is X-gal likely to be?
A) a compound chemically similar to glucose
B) a compound chemically similar to galactose
C) a compound chemically similar to lactose
D) a compound that cannot be transported into lacZ mutants
Correct Answer:
Verified
Correct Answer:
Verified
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