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Which enzyme's gene is used for blue-white colony screening of recombinants?
ALysozyme enzyme
BRibonuclease enzyme
CCellulase enzyme
DBeta-galactosidase
Answer & Solution
Correct answer: D. Beta-galactosidase
Insertion inside the beta-galactosidase coding sequence inactivates it, so recombinant colonies stay colourless.
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