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11 Nov 2019
Which of the following statements is FALSE with respect to the ribbon diagrams shown below? A. Protein 2 contains parallel b-sheet strands. B. Protein 3 contains a prosthetic group. C. The secondary structure of protein 3 is all a-helix. D. These proteins have both secondary and tertiary structure. a-helix and b-sheet secondary structure is located mainly in the interior of folded proteins, whereas irregular loops occur on the outside. Why? A. The loops are needed for the polypeptide to "turn corners" and this occurs on the outside of the protein. B. a-helix and b-sheet structures are more compact than loops, and so they fit better in the interior of the folded protein. C. The side chains in a-helix and b-sheet structures are mostly non-polar. D. The H bonding requirements of the polypeptide backbone in irregular loops are not fully satisfied, and so these structures interact with water at the surface. What do a boiled egg and curdled milk have in common? A. Both smell revolting. B. Both are usually found in a kitchen. C. Both would be found in my kitchen if I actually ever cooked. D. Both illustrate the denaturation of proteins. Which of the following series of amino acids is MOST likely to be at the surface of a water -soluble globular protein? A. _____met-phe-pro-ile-leu_____ _____tyr-phe-gly-asn-leu_____ C. ______glu-asn-ser-thr-arg_____ D. _____ val-ala-val-glu-val _____ E. _____ met-cys-pro-ala-tyr_____
Which of the following statements is FALSE with respect to the ribbon diagrams shown below? A. Protein 2 contains parallel b-sheet strands. B. Protein 3 contains a prosthetic group. C. The secondary structure of protein 3 is all a-helix. D. These proteins have both secondary and tertiary structure. a-helix and b-sheet secondary structure is located mainly in the interior of folded proteins, whereas irregular loops occur on the outside. Why? A. The loops are needed for the polypeptide to "turn corners" and this occurs on the outside of the protein. B. a-helix and b-sheet structures are more compact than loops, and so they fit better in the interior of the folded protein. C. The side chains in a-helix and b-sheet structures are mostly non-polar. D. The H bonding requirements of the polypeptide backbone in irregular loops are not fully satisfied, and so these structures interact with water at the surface. What do a boiled egg and curdled milk have in common? A. Both smell revolting. B. Both are usually found in a kitchen. C. Both would be found in my kitchen if I actually ever cooked. D. Both illustrate the denaturation of proteins. Which of the following series of amino acids is MOST likely to be at the surface of a water -soluble globular protein? A. _____met-phe-pro-ile-leu_____ _____tyr-phe-gly-asn-leu_____ C. ______glu-asn-ser-thr-arg_____ D. _____ val-ala-val-glu-val _____ E. _____ met-cys-pro-ala-tyr_____
Patrina SchowalterLv2
2 Oct 2019