NEET Biology question

The role of DNA ligase in the construction of a recombinant DNA molecule is:

(A)Formation of phosphodiester bond between two DNA fragmentsCorrect
(B)Formation of hydrogen bonds between sticky ends of DNA fragments
(C)Ligation of all purine and pyrimidine bases
(D)None of the above

Answer: (A)

Solution

Hydrogen bonding between sticky ends occurs spontaneously via base pairing and is not itself the enzymatic action, and ligase does not indiscriminately "ligate

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Question ID VK-125030