9: Proteins (part 2: Peptide bond and R groups) Quizellenjmchenry2022-11-23T13:55:25-05:00 Please sign up for the course before taking this quiz. 8: Proteins (part 1: Amino acids) 10: Proteins (part 3: Protein folding) Back to: 9: Proteins (part 2: Peptide bond and R groups)