If a recombinant DNA bearing gene for ampicillin resistance…

Biology Biotechnology Principles and Processes Single Correct MCQ

Published on: August 21, 2026

If a recombinant DNA bearing gene for ampicillin resistance is transferred into E. coli and the host cells are spread on agar plates containing ampicillin, then

both transformed and untransformed recipient cells will die

both transformed and untransformed recipient cells will grow

transformed recipient cells will grow and untransformed recipient cells will die

transformed recipient cells will die and untransformed recipient cells will grow

Text Solution

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The correct answer is:

In this scenario:

E. coli cells are transformed with a recombinant DNA carrying the ampicillin resistance gene.

Agar plates contain ampicillin, which kills bacteria that are not resistant.

So:

Transformed cells (with ampicillin resistance) → will survive and grow.

Untransformed cells (without resistance) → will die.

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