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Solution


Q.

If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:                    [2024]
1 CATTAGCT  
2 TACGAAGT  
3 GTACTTAC  
4 ATGCGACT  

Ans.

(2)

The two strands are complementary to each other because the hydrogen bonds are formed between specific pairs of bases. Thus if one strand of a DNA has the sequence ATGCTTCA, sequence of bases in complementary strand is TACGAAGT.