February 23, 2017

Homework Help: Peptide Bonds

Posted by Lena on Thursday, March 3, 2011 at 7:02pm.

Which of the following shows linear sequence of atoms joined by covalent bonds in peptide backbone.

a) -N-C-C-N-C-C-N
b) -N-C-O-N-C-O-
c) -N-C-C-O-N-C-C-O

The answer is a). Is that because it's the only one that linear; as in it doesn't have any oxygens or hydrogens coming off of it? I don't exactly know why a) is correct b/c I thought that peptide bond is formed by condensation reaction in which you would have N-C which all options have.

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