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Solution:
Sticky ends contain free or hanging or unpaired nitrogen bases which can pair to complementary bases present on other DNA segment required to create a recombinant DNA. A ligase is required in absence of sticky ends to join together two segments of DNA. So, the correct answer is 'Sticky ends can be joined by using DNA ligases.'
![Q22. Identify the wrong statement with regard to Restriction Enzymes.](https://static.wixstatic.com/media/bb7697_251d8904afc1414994c1ec06648a8197~mv2.png/v1/fill/w_670,h_379,al_c,lg_1,q_85,enc_auto/vlcsnap-2021-07-19-18h08m15s115.png)
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