Biology Biotechnology Principles and Processes Processes of Recombinant DNA Technology Single Correct MCQ
Published on: August 11, 2026

In genetic engineering, the antibiotics are used:

A
as selectable markers
B
to select healthy vectors
C
as sequences from where replication starts
D
to keep the cultures free of infection

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The correct answer is:
A

In genetic engineering, genes for antibiotic resistance (e.g., amp R , tet R ) are used as selectable markers. Only bacteria that have successfully taken up the recombinant plasmid can grow in the presence of the antibiotic.

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