Question

Which of the following is NOT a part of the primary protein structure?

• A. the conformation of the polypeptide backbone
• B. the amino acid sequence
• C. the disulfide linkages
• D. the planar nature of the amide linkage

Answer 1

The correct option is A the conformation of the polypeptide backbone

The primary structure of the protein is the sequence of the amino acids, which are linked by covalent bonds, disulphide linkages, and the amide or peptide linkages are formed between the amino and the carboxyl groups of the adjacent amino acids. The conformation of the polypeptide backbone is determined by the phi( N- Calpha) and the psi (C alpha- C) angles.