Why is it that not all the angles between C-N can freely rotate?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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Why is it that not all the angles between C-N can freely rotate? 

X Which describes the peptide bonds in the peptide Lys-Arg-Gln-Asp-Cys? * 0/1
All the peptide bonds are covalent amide bonds with tetrahedral geometry
All the peptide bonds have free rotation around the carbon-nitrogen bond
All the peptide bonds can be deprotonated when titrated with NaOH
All the peptide bonds have partial double-bond character and trans configuration
Correct answer
All the peptide bonds have partial double-bond character and trans configuration
X
Transcribed Image Text:X Which describes the peptide bonds in the peptide Lys-Arg-Gln-Asp-Cys? * 0/1 All the peptide bonds are covalent amide bonds with tetrahedral geometry All the peptide bonds have free rotation around the carbon-nitrogen bond All the peptide bonds can be deprotonated when titrated with NaOH All the peptide bonds have partial double-bond character and trans configuration Correct answer All the peptide bonds have partial double-bond character and trans configuration X
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