Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If the r-plasmid does not have an insert, it will give colonies of which colour?
Text Solution
Verified by ExpertsThe correct answer is:
C
In blue-white screening, if the recombinant plasmid (r-plasmid) does not contain an inserted DNA fragment, the lacZ gene remains functional and produces β-galactosidase. This enzyme converts X-gal into a blue-colored product, resulting in blue colonies.
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