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44107a_E2 - name BICH 441 EXAM 2 An Aggie does not lie...

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name ________________________________________ BICH 441 EXAM 2 March 27, 2007 An Aggie does not lie, cheat, or steal, or tolerate those who do. I swear on my honor as an Aggie that I have not received or given unauthorized aid on this exam, and I am not aware of others who have received or given unauthorized aid on this exam. signed _________________________________________________________ NO CALCULATORS! Before you begin, write your name on each page (there are 6 pages) and sign the Aggie Honor Code statement above. Information you may find useful in answering some of the questions: 1 2 O 2 + 2 H + + 2 e H 2 O E 0 ' = 0.861 V plastocyanin (Cu 2+ ) + e plastocyanin (Cu + ) E 0 ' = 0.32 V cytochrome c (Fe 3+ ) + e cytochrome c (Fe 2+ ) E o ' = 0.254 V UQ + 2 H + + 2 e UQH 2 E o ' = 0.060 V FAD + 2 H + + 2 e FADH 2 E o ' = – 0.219 V NAD + + H + + 2 e NADH E o ' = – 0.32 V ferredoxin ox + e ferredoxin red E o ' = – 0.43 V F = 96.5 kJ/V•mol Questions 1-15 (2 pts each). Enter your answer on your Scantron sheet. 1. What is E 0 ' for the reaction catalyzed by Complex I in mitochondrial electron transport? A. 0.38 V B. 0.607 V C. 0.706 V D. 0.801 V 2. Which of the following is the best estimate for G°' for the reaction catalyzed by Complex IV in mitochondrial electron transport? 3. G°' for the reaction catalyzed by cytochrome b 6 /f in photosynthetic electron transport is –50 kJ/mol PQ. Calculate the standard reduction potential for the half reaction: PQ + 2 H + + 2 e PQH 2
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