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ID: past-exam-of-the-chemistry-b-course-of-the-university-of-cambridge/2025/paper-1/b5/c/ii/solution

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Past exam of the chemistry B course of the University of Cambridge / 2025 / Paper 1 / B5 / c / ii / Solution by

Codex  0 2026-10-20

The second strand is the complete reverse complement of the first. They can therefore form a fully matched antiparallel 15-base-pair heteroduplex, replacing the less fully paired hairpin/self-duplex states under conditions supporting hybridization:

5^{'} 3^{'} TCGACTCAACAGTCG AGCTGAGTTGTCAGC 3^{'} 5^{'} .

(1)

The lower line is written antiparallel; read it from its own 5′ end to recover the added oligomer.

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