Which one of the following palindromic base sequences in DNA can be easily cut a about the middle by some particular restriction enzyme ?

Options

A. 5' - CACGTA - 3'
3' - CTCAGT - 5'
B. 5' -CGTTCG -3'
3' - ATGGTA- 5'
C. 5'- GATATG - 3'
3' - CTACTA -5'
D. 5'- GAATTC - 3'
3' - CTTAAG - 5'

Answer

D

Explanation

The palindromic sequences that read same in both 3’ – 5’ direction and 5’ – 3’ direction is cleaved by restriction enzyme to form blunt end or sticky end.