Which of the following statements is true regarding plasmids?

  • A
    They are found in viruses.
  • B
    They contain genes for vital life processes.
  • C
    They are a part of the chromosomal $DNA$.
  • D
    They are widely used in genetic engineering.

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To isolate $DNA$ from fungal cells,bacterial cells,and plant cells,the enzymes required are respectively:

Due to the chloramphenicol resistance gene,one is able to select a transformed cell in the presence of chloramphenicol. The chloramphenicol resistance gene in this case is called:

Insertion of a foreign $DNA$ at $BamHI$ site in an $E. coli$ cloning vector $pBR322$ results in the loss of antibiotic resistance towards :

$A$ gene library or $DNA$ library contains a collection of:

Which restriction site is present in the $tet^{R}$ gene in $pBR322$?

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