The restriction enzyme EcoR1 recognizes the DNA sequence GAATTC. Which DNA strands will be cut by EcoR1?
I.
TTCAGGAATTCGGAAACC AAGTCCTTAAGCCTTTGG
II.
TGAATCGAACCTG ACTTAGCTTGGAC
III.
TTAAGCGGCCGAATTCAGTCCA
AATTCGCCCGCTTAAGTCAGGT
IV.
CAGTAGGATTTCTGTGTC
GTCATCCTAAAGACACAG
I and III is the correct solution.