This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Proteins bonds and structure, Subject name: Biochemistry
[{'content': 'The peptide bond has all the following characteristics, EXCEPT:- \nSelect and explain. \nA. Covalent in nature, B. Planar in nature, C. Paial double bond character, D. Free to rotate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A peptide bond is a special type of amide bond -Characteristics of peptide bond:- Planar Uncharged Takes pa in hydrogen bonding Trans in configuration Rigid, because of paial double bond character - no rotation is possible', 'role': 'assistant'}]