Home Biology Biotechnology Principles and Processes NCERT An antibiotic resistance gene in a vector us…
Biology Biotechnology Principles and Processes NCERT Single Correct MCQ
Published on: August 13, 2026

An antibiotic resistance gene in a vector usually helps in the selection of which of the following cell?

A
Transformed cell
B
Competent cell
C
Recombinant cell
D
None of these

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The correct answer is:
A

An antibiotic resistance gene in a vector acts as a selectable marker. It helps identify transformed cells—cells that have successfully taken up the recombinant DNA.

Transformed cells survive in the presence of antibiotic because they carry the resistance gene.

Non-transformed cells die.

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