in Principles and process of Biotechnology by

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The functions of DNA ligases are:

  1. The DNA ligases repair the broken phosphodiester bonds.
  2. It helps in DNA repair, DNA replication and genetic recombination.
  3. It is a key enzyme for producing the rDNA.
  4. It acts as molecular glue which helps to stick the DNA fragment.
  5. It can also join the blunt fragments.