Which of the following enzymes are used to join bits of DNA?

Which of the following enzymes are used to join bits of DNA?
  1. Ligase
  2. Primase
  3. DNA polymerase
  4. Endonuclease

Solution

DNA ligase joins pieces of DNA together, mainly joins Okazaki fragments with the main DNA piece. DNA polymerase is responsible for forming new copies of DNA, in the form of nucleic acid molecules. DNA primase catalyses the synthesis of a short RNA segment called a primer complementary to a DNA template. Endonucleases are enzymes that cleave the phosphodiester bond within a polynucleotide chain.

Asked in: NEET 2002

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