in DNA the purines,BLANK AND BLANK were always paired with the group of compounds known as BLANK?

in DNA the purines,BLANK AND BLANK were always paired with the group of compounds known as BLANK?PLEASE HELP FILL IN THE BLANKS

watson and crick proposed that in DNA the purines,BLANK AND BLANK were always paired with the group combination known as BLANK. the two compounds that the purines pair are BLANK AND BLANK?

boB
the first two are the proteins Guanine and Adenine, the second group is the pyrimidine's and it is composed of Cytosine and Thymine, as well as Uracil in RNA

DNAunion
watson and crick proposed that in DNA the purines, [ADENINE AND GUANINE] were always paired with the group combination known as [PYRIMIDINES]. the two compounds that the purines pair are [THYMINE AND CYTOSINE]?

BP
Watson and Crick proposed that in DNA the purines, ADENINE AND GUANINE are always paired with a group of compounds known as PYRIMIDINES.

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