Restriction enzyme EcoR I cleavages DNA at the sequence
A
AAGCTT
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B
AAGTTC
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C
GTATATC
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D
GAATTC
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E
TATAGC
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Solution
The correct option is D GAATTC It is a restriction enzyme that cleaves DNA double helices into fragments at specific sites and is also a part of the restriction modification system. The nucleic acid recognition sequence where the enzyme cuts is GAATTC which has a palindromic, complementary sequence of CTTAAG.