Biology : PU-CET (U.G) 2018 Panjab University Entrance Exam With Answers

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45.

For blue-white screening of the clones containing recombinant DNA, the chromogenic substrate added to the agar plate is :

A: β-galactrosidase
B: IPTG
C: X-Gal
D: lacZ

The answer is: C

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