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44106a_E1

# 44106a_E1 - name BICH 441 EXAM 1 An Aggie does not lie...

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name ________________________________________ BICH 441 EXAM 1 February 16, 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: fructose-1,6-bisP + H 2 O fructose-6-P + P i G°' = –13.3 kJ/mol 1,3-bisphosphoglycerate + H 2 O 3-phosphoglycerate + P i G°' = –49.4 kJ/mol PEP + 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 1-16 (2 pts each). Enter your answer on your Scantron sheet. 1. G°' for the reaction in glycolysis catalyzed by pyruvate kinase is: A. –31.7 kJ/mol B. –30.5 kJ/mol C. 31.7 kJ/mol D. 62.2 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: 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. C. the reaction is coupled to ATP hydrolysis. D. the reaction is coupled to ATP synthesis.

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44106a_E1 - name BICH 441 EXAM 1 An Aggie does not lie...

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