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    Meselson and Stahl investigated DNA replication by first feeding bacteria with bases containing $^{15}$N (heavy), and then with bases containing $^{14}$N (light). The results are shown in the photographs.

    Question
    HLPaper 1A

    Meselson and Stahl investigated DNA replication by first feeding bacteria with bases containing 15^{15}15N (heavy), and then with bases containing 14^{14}14N (light). The results are shown in the photographs.

    From this information, what would be the composition of the DNA in generation 3?

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