The key tools required for the recombinant $DNA$ technology are:
$I.$ Restriction enzymes
$II.$ Polymerase enzymes
$III.$ Ligases
$IV.$ Vectors
$V.$ Host organisms
Select the correct option.

  • A
    $I, II$ and $III$ only
  • B
    $I, III, IV$ and $V$ only
  • C
    $I, II, III$ and $V$ only
  • D
    $I, II, III, IV$ and $V$

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If a foreign $DNA$ fragment is inserted into the $BamHI$ site of $pBR322$ to create $r-DNA$,in which medium will the recombinants not grow?

Known sequence of $DNA$ that is used to find a complementary $DNA$ strand is:

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