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

Options

A. 5'________GAATTC_________3'
3' ______CTTAAG________5'
B. 5'________CACGTA_________3'
3' ______CTCAGT________5'
C. 5'________GATATG_________3'
3' ______CTACTA________5'
D. 5'________CGTTCG_________3'
3' ______ATGGTA________5'

Answer

A

Explanation

Restriction enzyme cuts DNA at or near specific nucleotide sequence which are palindromic known as restriction site. Restriction enzyme produce double standard out in DNA. If cut DNA by EcoR1, DNA would be cut right in middle and all will be of same size.