A gene, whose expression helps to identify transformed cells is known as
(a) selectable marker (b) vector
(c) plasmid (d) structural gene
(a) A gene whose expression helps to identify transformed cell is known as selectable marker. Usually, the genes encoding resistance to antibiotics, such as tetracycline, ampicillin, etc. are useful selectable markers for e.g E.Coli.
Concept Enhancer Plasmid pBR322 has two resistance genes; amphicillin resistance (ampR) and tetracyclin resistance (tetR). These are considered as useful selectable markers.