ACS BIOCHEMISTRY 360 FINAL EXAM REVIEW KEY 2023/2024.WITH 100% CORRECT ANSWERS AND FEEDBACK(Verified

ACS BIOCHEMISTRY 360 FINAL EXAM REVIEW KEY 2023/2024.WITH 100% CORRECT ANSWERS AND FEEDBACK(Verified 1. Which of the following statements about collagen is correct? a) Collagen contains a high proportion of hydroxylated proline residues. b) Collagen is a globular, intracellular protein. c) Post-translational modification of collagen involves vitamin A. d) The structure of collagen consists of a superhelix of three α helices twisted together Explanation – collagen has α chains, NOT helices. Each of the polypeptides in the triple superhelix of procollagen is an unusual left-handed helix not the right-handed α helix seen in globular proteins. However, the three polypeptides are twisted around each other in a right- handed manner to form the triple helix. All α helices are right-handed and get broken from high amounts of proline, hydroxylated proline, and glycine; but, these triplets of amino acids strength collagen. Glycine-X-Y.