blunt ends are produced by which of the following restriction enzyme

1. alu I
2. pst I
3. sma I
4. hind III

Hello Student
Correct Answer is 1. Alu I

Alu I is obtained from Arthrobacter luteus which recognises the sequence AGCT.
Restriction endonuclease enzyme is extracted from Alu and acts at the centre of a palindromic tetranucleotide sequence to give even-ended duplex DNA fragments phosphorylated at the 5'-end.