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Biology 11 Online
OpenStudy (anonymous):

The steps of the DNA ladder are made of _____.

OpenStudy (anonymous):

4 nitrogen bases that occur in pairs. Adenine pairs with thymine Cytosine pairs with guanine The first two answers misspelled thymine

OpenStudy (mokeira):

The steps of the ladder are made of two bases joined together with either two or three weak hydrogen bonds.

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