Question

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

• A. 5' - CGTTCG - 3'
  3' - CCAAGC - 5'
• B. 5' - GAATTC - 3'
  3' - CTTAAG - 5'
• C. 5' - CTACTG - 3'
  3' - GTGCAA - 5'
• D. 5' - CACGTA - 3'
  3' - GCATAC - 5'
• E. 3' - CGAATG - 5'
  3' - CGAATG - 5'

Answer 1

Answer: (B)

Palindromic nucleotide sequence in the DNA molecule is the sequence of base pairs that reads same when orientation of reading is same, i.e., 5' to 3' on both strands or 3' to 5' on both strands.