Question

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

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

Answer 1

The correct option is B 5'.............GAATTC.............3'

3'.............CTTAAG.............5'
Palindromic sequences in DNA are the sequence of 4/6/8 nucleotide bases that reads the same on both strands of DNA in 5→3’ direction.
5'.............GAATTC.............3'
3'.............CTTAAG.............5' is a palindromic sequence, which is cut by the restriction enzyme EcoRI.