Home Biology Biotechnology Principles and Processes Previous Year Questions A gene whose expression helps to identify tr…
Biology Biotechnology Principles and Processes Previous Year Questions Single Correct MCQ
Published on: August 12, 2026

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

A
Vector
B
Plasmid
C
Structural gene
D
Selectable marker

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The correct answer is:
D

A selectable marker gene helps identify transformed cells because its expression allows only transformed cells to survive or be detected, distinguishing them from non-transformed ones.

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