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Readme [11.4K]
4 years ago
11

Why do purines pair with pyrimidines?

Biology
1 answer:
Trava [24]4 years ago
5 0
<span>It has to do with the size of each molecule. One is large (double ring) and the other is small (single ring). If 2 purines would pair, pyrimidines next to them wouldn't be able to bind with each other, and if two pyrimidines would bond, there wouldn't be enough space for 2 purines next to them to fit. By having them pair with each other, the spacing along the length of DNA or RNA is kept uniform. </span>
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