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:
Enzymes used in recombinant DNA technology are (1) reverse transcriptase (2) ligase (3) phosphatase (4) restriction endonudeasesA) 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: C
Solution :
Restriction endonucleases and ligases both are the main tools of genetic engineering. Restriction endonucleases are also called molecular scissors as these enzymes cut the DNA at highly specific sites on both the strands of duplex while ligases are the enzymes used to seal the nicks formed by restriction enzymes.
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