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Read the following statements and choose the correct option: 1. Same kind of sticky ends are produced when a DNA has been cut by different restriction enzymes 2. Exonucleases make cuts at specific positions within the DNA 3. Hind II was the first restriction endonuclease to be isolated 4. A bacteriophage has the ability to replicate within bacterial cells by integrating its DNA with bacterial DNA 5. DNA fragments mov

Options

  1. A1 and 3 are correct
  2. B3 and 4 are correct
  3. CAll are correct
  4. DAll are incorrect

Correct answer

B. 3 and 4 are correct

Step-by-step solution

Restriction endonucleases are used in genetic engineering to form ‘recombinant’ molecules of DNA, which are composed of DNA from different sources/genomes. When cut by the same restriction enzyme, the resultant DNA fragments have the same kind of ‘sticky-ends’ and, these can be joined together (end-to-end) using DNA ligases

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