Monday, October 8, 2018

inorganic chemistry - DNA pairs (adenine-thymine, guanine-cytosine)



Well I was wondering why adenine pairs with thymine and cytosine pairs with guanine.


From those pictures:


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Thymine has the lowest acidity and adenine has the biggest acidity.



So it is logical that the intermolecular bond will be strong.


Adenine and Cytosine have pretty much the same acidity so why is it energetically favorable for guanine to make an intermolecular bond with cytosine?


Is it due to the three combinations this (adenine-thymine, cytosine, guanine) has the lowest energy?




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