Biology Biotechnology Principles and Processes All Topic Question For Revision Test Single Correct MCQ
Published on: August 11, 2026

When a recombinant DNA is inserted within the coding sequence of an enzyme β-glactosidase then it is referred as –

A
Blue-White selection
B
Insertiona inactivation
C
Insertional activation
D
Blue-Yellow selection

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Text Solution

Verified by Experts
The correct answer is:
B

When foreign DNA is inserted into the lacZ gene (coding for β-galactosidase), the gene is disrupted and loses its function. This phenomenon is called insertional inactivation and is used in blue-white screening.

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