153A_Final_W10_answers

153A_Final_W10_answers - Chemistry and Biochemistry 153A,...

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Chemistry and Biochemistry 153A, Winter 2010 Final Exam Answers 1. (5) 1,3-BPG. It transfers a phosphoryl group to ADP, whereas F6P gets a phosphoryl from ATP to form FBP. ( Or , it has a more negative ΔG of hydrolysis. Or , it has a greater stabilization of hydrolysis products relative to reactants.) 2. (4) a, b 3. a. (3) True b. (3) True c. (3) False d. (3) False 4. a. (2) a b. (3) Competitive inhibitors bind in place of the substrate, so a higher concentration of substrate is required to achieve half-maximal reaction velocity. c. (2) True 5. (12) 6. a. (3) An interaction between a protein and its ligand, which results in a conformational change that increases the protein’s affinity for the ligand b. (3) A, D, I c. (4) It prevents hydrolysis of the ‘high-energy’ substrates 7. a. (3) A, C b. (3) c. (3) ΔG' ° = -nFΔE' ° ; ΔE' ° = ΔG' ° /-nF = (-42.7 kJ/mol)/-2(96.5 kJ/ V mol) = 0.221 V d. (3) ΔE' ° = E' ° acceptor - E' ° donor = E' ° NAD+ - E' ° GAP ; E' ° GAP = E' ° NAD+ - ΔE' ° = -0.315 V – 0.221 V = -0.536 V e. (3) 3-PG + 3H + + 2e - GAP + H 2 O f. (4) The following reaction is highly favored, so it depletes 1,3-BPG and pulls this reaction forward. 8.
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This note was uploaded on 08/26/2011 for the course CHEM 153A taught by Professor Staff during the Spring '05 term at UCLA.

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153A_Final_W10_answers - Chemistry and Biochemistry 153A,...

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