Question

The restriction endonuclease of ECOR I recognises and cleaves DNA in the following sequence as 5'^GAATTC^3'
what is the probable number of clevage site can occur?
a) 10
b) 100
c) 50
d) 2​

Answer 1

your answer is option d ...i.e 2 as

EcoRI cuts the the dna fragments from fixed site at 3' and 5' end of sequence GAATTC.