Which of the following statements about protein structure is/are correct? a) Alp
ID: 1001755 • Letter: W
Question
Which of the following statements about protein structure is/are correct? a) Alpha-helix is stabilized primarily by the presence of numerous hydrophobic interactions. b) Beta structure involves hydrogen bonding between extended regions in a parallel direction only. c) Quaternary structure refers to the cross-linking of globular proteins with disulfide bonds. d) Disulfide bonds are formed after the polypeptide has folded into its three dimensional structure. A. Mark answer 'A' if statements 1, 2 and 3 are correct. B. Mark answer 'B' if statements 1 and 3 are correct. C. Mark answer 'C' if statements 2 and 4 are correct. D. Mark answer 'D' if ONLY statement 4 is correct. E. Mark answer 'E' if statements are ALL correct, or they are ALL incorrect.
Explanation / Answer
E -All are incorrect
-helix stabilised by hydrogen bonding and the hydrogen bonding in ß structure may be parallel or antiparallel. The quaternary structure refers to how several protein subunit interact with eachother by means of various interactions, including hydrogen-bonding, disulfide-bridges and salt bridges giving rise to final structure.
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