44106a_Q3 - the enzyme that is first, a 2 next to the one...

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Name ______________________________________ Signature _________________________________ BICH 441 February 8, 2006 Quiz 3 NO CALCULATORS! 1 (4 pts). Draw the reaction catalyzed by isocitrate dehydrogenase as it occurs in the TCA cycle. Show the names and structures of all reactants and products, but you do not need to draw the structure of NAD + or NADH, nor do you need to show the reaction mechanism. 2 (5 pts). Draw the reaction catalyzed by succinyl-CoA synthetase as it occurs in the TCA cycle. Show the names and structures of all reactants and products, but you do not need to draw the structure of CoA, nor do you need to show the reaction mechanism. 3 (2 pts). Put the following TCA cycle enzymes in the correct order in which they occur in the TCA cycle. (Place a 1 next to
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Unformatted text preview: the enzyme that is first, a 2 next to the one that is second, etc.) ___ isocitrate dehydrogenase ___ aconitase ___ -ketoglutarate dehydrogenase complex ___ succinyl-CoA synthetase 4 (4 pts). Shown below is the structure of an intermediate in the reaction catalyzed by the pyruvate dehydrogenase complex. Starting from this intermediate, show the steps in the reaction mechanism that lead to production of acetyl-CoA. You do not need to show any of the mechanism past production of acetyl-CoA. You do not need to draw the structure of CoA....
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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.

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