All of the Following Statements About the Peptide Bond Are

Multiple Choice

All of the following statements about the peptide bond are true EXCEPT which one?

A) Peptide bonds can be formed by any of the naturally occurring amino acids.
B) There is free rotation around the peptide bond.
C) The peptide bond contains a carbonyl group.
D) The nitrogen atom of the peptide bond does not contain a plus charge below pH 5.0.
E) In proteins, not all of the amino groups occur in peptide bonds.