Q. In the following palindromic base sequences of DNA, which one can be cut easily by particular restriction enzyme?
A) 5' G T A T T C 3' ; 3' C A T A A G 5'
B) 5' G A T A C T 3' ; 3' C T A T G A 5'
C) 5' G A A T T C 3' ; 3' C T T A A G 5'
D) 5' C T C A G T 3' ; 3' G A G T C A 5'
Explanation
[Solution] 5'-GAATTC-3' reads the same as its complementary strand read 5' to 3', making it a palindrome; it is the EcoRI recognition site. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.