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Which enzyme recognizes the GGATCC sequence?

Answer and explanation

Correct answer: BamHI

Direct answer: Option A, BamHI. The recognition sequence associated with BamHI is 5′-GGATCC-3′. It recognizes this sequence and cuts within it, producing DNA ends useful in recombinant-DNA work. Option A is correct because GGATCC is the standard BamHI recognition sequence. Option B, EcoRI, recognizes GAATTC, not GGATCC. Option C, HindIII, recognizes AAGCTT, not GGATCC. Option D, AluI, recognizes AGCT, so it also does not match the sequence given. The reasoning is therefore a direct sequence-to-enzyme match: GGATCC → BamHI. Recognition sequences are normally written on one strand; the opposite strand is the complementary antiparallel sequence. Exam cue: remember “BamHI—GGATCC,” while “EcoRI—GAATTC” and “HindIII—AAGCTT” are common contrasting pairs.

Related tags

BamhiGgatccRestriction Enzymes

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