Topic: Tools: restriction enzymes, vectors, host· Biotechnology and Its Applications

A gene whose expression helps to identify transformed cell is known as :

1. Vector

2. Plasmid

3. Structural gene

4. Selectable marker

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Answer: 4. Selectable marker

A selectable marker is a gene whose expression lets us identify and select transformed cells, for example an antibiotic resistance gene.

A vector carries the foreign DNA, a plasmid is one kind of vector, and a structural gene codes for a protein but is not used to identify transformants.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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A gene whose expression helps to identify transformed cell is known as :

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