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Gabriel C.

asked • 09/09/17

Where are hydrogen bonds located in nucleic acids and carbohydrates?

I'm having trouble answering the following questions: “where would you find hydrogen bonds in nucleic acids?” “where would you find hydrogen bonds in carbohydrates”?

2 Answers By Expert Tutors

By:

J.R. S.

tutor
Not sure I've ever heard of hydrogen bonds forming when O and N are bonded to C.  I'm pretty sure they only occur when H is bonded to O, N or F.
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09/13/17

Bruce P.

tutor
I think we've crossed wires on who "has" the H and to whom the H is bonded/shared. I'm referring to the electronegative atom to which hydrogen is weakly bonded:
 
In GC basepair, for example, two instances of
 
-NH2 ---- O=C<
(Dashed line is H-bond)
so an H is covalently bonded to N, but the hydogen bond is between that H and an oxygen which has partial negative charge by virtue of "stealing time" with electrons shared with carbon to which it is covalently bonded (the 'less than' sign indicates bonds between carbon and other members of purine ring)
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09/13/17

J.R. S.

tutor
Thanks for clarifying. We are on the sa page. 
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09/13/17

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