M.Sc. Bio-Chemistry (PU-CET P.G) 2018 Panjab University Entrance Exam With Answers

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35.

One of the following functions as gratuitous inducer of lac operon;

A: Galactose
B: Isopropyl thiogalactoside
C: X-Gal
D: Isopentyl pyrophosphate

The answer is: B