Bases and Hydrogen bonds

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jsmith613
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Posts: 31
Joined: Sat Jul 25, 2009 9:37 pm

Bases and Hydrogen bonds

Post by jsmith613 » Fri Jan 07, 2011 3:46 pm

I have two questions
1) Why does adenine always pair thymine and cytosine always pair with guanine

2) why does the Cytosine-Guanine bond contain 3 hydrogen bonds whereas the adenine-thymine contain 2 hydrogen bonds

---------------
I know about purine (A and G) and pyrimidine bases (T and c)
I know why A and G cant bond and why T and C cant bond but I don't get wh A cant bond with either C or T
the same applies for G.

I

magicsiew
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Joined: Sun Jan 24, 2010 3:07 pm

Post by magicsiew » Fri Jan 07, 2011 4:17 pm

U will find answers for all your question here

http://users.rcn.com/jkimball.ma.ultran ... iring.html

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