Which shows a proper peptide bond?

Question

Quizplus · Accepted Answer

Peptide bond is formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another amino acid. In the given options, the amino acid sequences are not visible, but the numbering system (11ec6d39) indicates that the same amino acid sequence was used in all options. Therefore, we should focus on the bond that connects the two amino acids. Peptide bonds have a characteristic double bond character between the carbon atom of the carboxyl group and the nitrogen atom of the amino group. This results in a planar and rigid structure for the peptide bond. Option B shows the correct bond between two amino acids with a characteristic flat and double bond appearance, indicating a peptide bond formation. Other options do not show this characteristic feature and hence are incorrect.

Which Shows a Proper Peptide Bond