Multiple Choice
A compound known as X-Gal is widely used in molecular genetic research.When wild-type (normal) E.coli is grown on medium containing X-Gal,the bacterial colonies turn blue.In contrast,when lacZ mutants are grown on medium 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
E) a compound that can only be transported into lacA mutants
Correct Answer:
Verified
Correct Answer:
Verified
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