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Mathematics 21 Online
OpenStudy (anonymous):

what structural problem prevents adenine from pairing with guanine?

OpenStudy (anonymous):

anyone

OpenStudy (anonymous):

The space between two strands' backbones is too small to fit two purines. Also, there are two hydrogen bonds between A and T, as opposed to the three between C and G. This issue arises from the structure of the molecules and arrangement of the outer hydrogen atoms.

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