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classes%5Cspring09%5C153CID30%5Cfinalexam153CW07

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1 FROM: C.F. CLARKE Two Dept. of Chemistry and Biochemistry Stamps University of California, Los Angeles Here 607 Charles E. Young Drive East Los Angeles, CA 90095-1569 CH-2A TO:
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2 Chemistry & Biochemistry 153C Winter 2007 Name____________________________________ Student I.D. #____________________________ FINAL EXAMINATION 23 March 2007 (165 points, 7 pages including cover page, 180 minutes) Total Score and Grade on Final _____________ Total Score in Course _____________ Assigned Grade _____________ POTENTIALLY USEFUL CONSTANTS: R = 0.0083 kJ mol -1 ˚K -1 ; Ambient temp = 298˚K; F = 96.5 kJ mol -1 volt -1 ; 1 kcal = 4.2 kJ POTENTIALLY USEFUL REDUCTION POTENTIALS (E o’ in mV): NADP + + 2e - + 2H + NADPH + H + (-320) NAD + + 2e - + 2H + NADH + H + (-320) 2e - + 2H + H 2 ( 0 ) PLEASE READ EACH QUESTION VERY CAREFULLY! 1. (20 points total) In the mitochondrial inner membrane the enzyme trans- hydrogenase carries out the following reaction: NADH + NADP + NADPH + NAD + Calculate the Δ G°’ of this reaction. This reaction helps maintain a ratio of NADPH / NADP+ of 10/1 within the mitochondrial matrix. Given that the ratio of NAD+ / NADH within the matrix is maintained at 100/1, what is Δ G of this reaction?
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