Why Is X-Gal Used in Cloning Medium

question 51

Multiple Choice

Why is X-gal used in cloning medium?

• A) It distinguishes between bacteria that have been transformed with recombinant plasmids and nonrecombinant plasmids by black-white screening.
• B) It distinguishes between bacteria that have been transformed with recombinant plasmids and nonrecombinant plasmids by blue-white screening.
• C) It distinguishes between plasmids that have been transformed and those that have not by blue-white screening.
• D) It distinguishes between plasmids that have been transformed and those that have not by black-white screening.

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