ch06 - Chapter 6 Proteins Three-Dimensional Structure...

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Chapter 6: Proteins: Three-Dimensional Structure Matching For questions 1-10: A) tertiary structure B) keratin C) molecular chaperone D) hydropathy value E) cis F) trans G) forbidden conformation H) regular secondary structure I) collagen J) peptide group K) ribonuclease A L) alpha 1. The α helix and the β pleated sheet, with their repeating φ and ψ values, are examples of ______. Ans: H Section 6.1.B Learning objective: Secondary Structure 2. ______ is found in bone, teeth, cartilage, and tendons. Ans: I Section 6.1.C Learning Objective: Secondary Structure 3. The arrangement of the regular structural elements and the positions of atoms in the protein are considered part of ______. Ans: A Section 6.2.C Learning Objective: Tertiary Structure 4. A historical denaturation/renaturation experiment was carried out using the protein ______. Ans: K Section 6.4.B Learning Objective: Protein Stability 5. A rigid, planar structure consisting of about 40% double bond character is characteristic of a ______. Ans: J
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Section 6.1.A Level of Difficulty: Easy Learning Objective: Secondary Structure 6. A good way to predict whether an amino acid side chain is on the outside or inside of a protein is to use its ______. Ans: D Section 6.2.B Learning Objective: Tertiary Structure 7. A protein found in hair, horn, nails, and feathers is ______. Ans: B Section 6.1.C Learning Objective: Secondary Structure 8. In most peptide groups (with the exception of proline) the ______ conformation is not commonly observed Ans: E Section 6.1.A Learning Objective: Secondary Structure 9. Protein folding in vivo is assisted by a ______. Ans: C Section 6.5.B Learning Objective: Protein Folding 10. In a ______, the φ and ψ angles bring groups closer than their van der Waals distances. Ans: G Section 6.1.B Learning Objective: Secondary Structure Multiple Choice 11. In a Ramachandran diagram, ______ of the area represents allowed conformations of a polypeptide chain. A) more than 90% B) more than 50% C) about 50% D) less than 25% E) none of the above Ans: D Section 6.1.A Learning Objective: Secondary Structure
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12. In a protein, the most conformationally restricted amino acid is ______; the least conformationally restricted is ______. A) Trp, Gly B) Met, Cys C) Pro, Gly D) Ile, Ala E) Ala, Pro Ans: C Section 6.1.A Learning Objective: Secondary Structure 13. Conformation(s) that has (have) both a favorable hydrogen bonding pattern and φ and ψ values that fall within the allowed Ramachandran conformational regions is (are) _. A)
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This note was uploaded on 11/24/2011 for the course BIO 400 taught by Professor Raganbower during the Winter '10 term at Drexel.

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ch06 - Chapter 6 Proteins Three-Dimensional Structure...

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