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Question
Expression of a particular gene helps to identify transformants. What is this gene known as?
Options
Plasmid
Structural gene
Selectable marker
Intron
MCQ
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Solution
Selectable marker
Explanation:
A selectable marker is a gene whose expression lets you identify or select transformants (for example, antibiotic‑resistance genes or colour-producing marker genes); it permits screening of cells that have taken up the introduced DNA.
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