Q176 / 180 · NEET 2017 · Zoology

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

  • Correct answer
    A
    Selectable Marker
  • B
    Vector
  • C
    Plasmid
  • D
    Structural gene

Solution

In recombinant DNA technology, selectable markers help in identifying and eliminating non-transformants and selectively permitting the growth of the transformants.

In 1977, Bolivar and Rodriguez constructed the pBR322 plasmid vector. pBR322 is one of the most widely used E. coli cloning vectors. It contains ampicillin and tetracycline resistance genes that act as selectable markers.

Hence, the correct answer is option: 'A'.

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