Question

Choose the incorrect statement with reference to restriction enzymes.

• A. The specific palindromic sequence which is recognized by EcoRI is
  5′–CTTAAG–3′
  3′–GAATTC–5′
• B. Restriction enzymes may cut the strands of DNA a little away from the centre of the palindrome sites
• C. Restriction endonucleases are used in genetic engineering to form ‘recombinant’ molecule of DNA
• D. These enzymes cut the strands of DNA between the same two bases on the opposite strands

Answer 1

The correct option is A The specific palindromic sequence which is recognized by EcoRI is

5′–CTTAAG–3′
3′–GAATTC–5′
The specific palindromic sequence which is recognized by EcoRI is
5′ – GAATTC – 3′
3′ – CTTAAG – 5′