Q.

In the following palindromic base sequences of DNA, which one can be cut easily by a particular restriction enzyme          [2022]

1 5′ G A T A C T 3′ ; 3′ C T A T G A 5′  
2 5′ G A A T T C 3′ ; 3′ C T T A A G 5′  
3 5′ C T C A G T 3′ ; 3′ G A G T C A 5′  
4 5′ G T A T T C 3′ ; 3′ C A T A A G 5′  

Ans.

(2)