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Unformatted text preview: name ________________________________________ BICH 441 EXAM 2 March 30, 2006 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 ' = 0.861 V plastocyanin (Cu 2+ ) + e – → plastocyanin (Cu + ) E ' = 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 ' for the reaction catalyzed by Complex IV in mitochondrial eletron transport? A. 0.353 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 cytochrome b 6 /f in photosynthetic electron transsport? (Assume that plastoquinone has the same standard reduction potential as UQ.) A. –12 kJ/mol plastocyanin B. –25 kJ/mol plastocyanin C. –52 kJ/mol plastocyanin D. –110 kJ/mol plastocyanin 3. ∆ G°' for the reaction caralyzed by cytosolic glycerophosphate dehydrogenase in the glycerophosphate shuttle is –30 kJ/mol. Which of the following is the standard reduction potential for the half reaction: dihydroxyacetone-P + 2 H + + 2e – → glycerol-3-P ? A. 0.30 V B. 0.15 V C. – 0.08 V D. – 0.17 V 4. The malate-aspartate shuttle: A. is part of the Calvin cycle. B. allows cytosolic NADH to be oxidized via the mitochondrial electron transport chain. C. allows plants to synthesize carbohydrate from acetyl-CoA. D. is required to transport ATP out of the mitochondrial matrix. 5. The glycerophosphate shuttle operates using two forms of glycerophosphate dehydrogenase. One is located in the cytosol. The other is associated with the _______________________ and generates ______________________....
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This note was uploaded on 03/27/2010 for the course BICH 441 taught by Professor Staff during the Spring '08 term at Texas A&M.
- Spring '08