Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
The enzymes taking part in recombinant DNA technology are (1) restriction endonuclease (2) ligase (3) reverse transcriptase (4) phosphataseA) 1,2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: B
Solution :
Restriction endonucleases and ligase are the main tools of genetic engineering. Restriction endonucleases cut DNA at highly specific sites on both strands of duplex while ligase is used to seal the nicks formed by restriction enzymes.
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