[Campbell Biology P.127] Referring to Figure 5.15, which of the following statements about p... | Practice Question

Referring to Figure 5.15, which of the following statements about polypeptide formation is correct? Select all that apply

  • A: The N-terminus of the polypeptide chain is formed first.
  • B: The polypeptide backbone is highlighted in yellow and green in the figure.
  • C: A molecule of H2O is added during peptide bond formation.
  • D: The side chains (R groups) are attached to the polypeptide backbone.

Explanation

Figure 5.15 and its caption state that peptide bonds are formed starting with the amino acid at the amino end N-terminus . The figure also shows that the polypeptide backbone purple highlight has side chains yellow and green attached to it. Water is removed, not added, during dehydration reactions.