2008 BICH 441 1st Exam

2008 BICH 441 1st Exam - name _ BICH 441 EXAM 1 February...

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name ___________________________________________________________ 1 BICH 441 EXAM 1 February 13, 2008 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 5 pages) and sign the Aggie Honor Code statement above. Information you may find useful in answering some of the questions: fructose-1,6-bisP + H 2 O fructose-6-P + P i G°' = –13.3 kJ/mol 1,3-bisphosphoglycerate + H 2 O 3-P-glycerate + P i G°' = –49.4 kJ/mol phosphoenolpyruvate + H 2 O pyruvate + P i G°' = –62.2 kJ/mol glucose-6-P + H 2 O glucose + P i G°' = –13.8 kJ/mol citrate isocitrate G°' = +6.7 kJ/mol glucose-6-P fructose-6-P G°' = +1.67 kJ/mol ATP + H 2 O ADP + P i G°' = –30.5 kJ/mol R = 8.314 J/mol•°K; assume T = 25°C Questions 1-15 (2 pts each). Enter your answer on your Scantron sheet. 1. G°' for the reaction in glycolysis catalyzed by phosphoglycerate kinase is: A. –49.4 kJ/mol B. –30.5 kJ/mol C. –18.9 kJ/mol D. 30.5 kJ/mol 2. G°' for the reaction in the TCA cycle catalyzed by malate dehydrogenase is 29.7 kJ/mol. K' eq for this reaction is: A. 1.6 × 10 5 B. 5 C. 0.033 D. 6.2 × 10 –6 3. Inside a cell, G for the reaction in the TCA cycle catalyzed by malate dehydrogenase is approximately 0 (compare to question 2). This is most likely because: A. malate dehydrogenase changes G for the reaction. B. the concentration of oxaloacetate in the cell is very low compared to the concentration of malate.
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2008 BICH 441 1st Exam - name _ BICH 441 EXAM 1 February...

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