Question

Which one of the following is a palindromic base sequence in DNA that can be easily cut at at the middle by some particular restriction enzyme?

• A. 5’-------------CATTCG--------------------3’
  3’-------------GTAAGC-------------------5’
• B. 5’------------GATATG------------------3’
  3’------------CTATAC-------------------5’
• C. 5’------------GAATTC-------------------3’
  3’-------------CTTAAG-------------------5’
• D. 5’-------------CACGTA------------------3’
  3’-------------CTGCAT------------------5’

Answer 1

The correct option is C 5’------------GAATTC-------------------3’

3’-------------CTTAAG-------------------5’
Palindrome is a word, phrase, number or sequence of character that reads the same backward or forward. From the given options GAATTC 5' to 3' is a palindrome sequence because the pair sequence for this would also be GAATTC.