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Biology, 06.05.2021 01:00, twalters88
what does this mean? "DNA is in its composition characteristic of the species from which it is derived. This can ... be demonstrated by determining the ratios in which the individual purines and pyrimidines occur There appear to exist two main groups of DNA, namely the 'A-T type,' in which adenine and thymine predominate, and the 'G-C type,' in which guanine and cytosine are the major constituents."
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what does this mean? "DNA is in its composition characteristic of the species from which it is deriv...
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