Question

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

• A. 5'CACGTA3'
  3'CTCAGT5'
• B. 5'CGTTCG3'
  3'ATGGTA5'
• C. 5' GATATG 3'
  3' CTACTA 5'
• D. 5'GAATTC3'
  3'CTTAAG5'

Answer 1

The correct option is D 5'GAATTC3'

3'CTTAAG5'

• A DNA sequence whose 5'-to-3' sequence is identical on each DNA strand is known as a palindromic sequence, whereas the restriction enzyme is the type of enzyme which cuts DNA at a specific sequence in both the strands.

So the correct answer is- 5'GAATTC3'

3'CTTAAG5'.