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a US Kayla CoSOr\ CH 409/BI 409Test II: March 30, 2010 Directions: Answer on the paper provided. Write on one side only. Answer the questions in order. Write large and legibly enough that T can read it, Do not fold the paper. WHERE THERE ARE CHOIC MARK CLEARLY THE ONE YOU CHOOSE. OTHERWISE, I WILL GRADE “THE FIRST ONE. YOU AN} T PARTIAL CREDIT FOR PARTS OF EACII CHOICE, You iay select a question or questions for 10 bonus points, a ‘Choose ONE of the questions below: (15 points). A. Diagram the pathway of glycolysis beginning with glucose and ending with (7) pyruvate, showing the location in the cell where it occurs, all reactions, names, structures, enzymes, and co-factors. a = B. Diagram the Krebs cycle beginning with pyruvate. Give the location in the cell @ where it occurs, all reactions, names, structures, enzymes, and co-factors. AE. Answer all parts. (15 points) ~ A, Whet are amphibolic and anaplerotic provesses? @& B. What is the catabolic function of the Krebs Cycle? — C. What molecules produced in the Krebs cycle are used in anabolic processes, and how are they used? D, What is the role of pyruvate carboxylase in keeping the Krebs Cycle replenished with the necessary molecules? HESGive word equations for ONE of the following: (10 points) v. The reactions which allow fructose and galactose to enter into glycolysis. ~ B. Due to high positive AG values, there arc three steps in gluconeogenesis that are not the exact reverse of glycolysis. Give all equations for these sleps. --C. Give word equations for the reactions catalyzed by the pyruvate dehydrogenase complex in converting pyruvate to acetyl CoA. ae all parts of ONE of the following: (10 points) 4 Glucose is oxidized step wise during glycolysis to give 2 molecules of pyruvate, ———— which is still an energy rich molecule. Give word equations showing the three fates of pyruvate. B. 1. Give three regulatory enzymes in glycolysis and explain how each of these" / enzymes is inhibited, 2. Give the regulatory sites in the Krebs cycle and explain how certain enzymes! producis regulate this cycle ANSWER ALL PARTS OF ANY TWO OF THE 5 POINT QUESTIONS V-X. ~~ Y2<~A. What events trigger gluconeogenesis? 4. 5) ~B. Name three precursors necessary for guconeogenesis and give the source of each. VI. Where is hexokinase D found, and how does it differ from hexokinase? (over) 
