Which statement is correct for the $tet^R$ gene in the $pBR322$ plasmid?

  • A
    It has a $Pst I$ recognition site.
  • B
    It has $BamH I$ and $Sal I$ recognition sites.
  • C
    It has a $tet II$ recognition site.
  • D
    It has a $Pvu I$ recognition site.

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$3$. Methylation
$4$. Restriction digestion

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In the gene gun method,$DNA$ is coated onto which of the following?

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From which bacterium is the restriction endonuclease $Sal I$ isolated?

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