BCH 4054 October 6, 2000 HOUR TEST 2 NAME________ ____________ Points (12) 1. Pyruvate kinase has a very large negative ∆Go', and so the reaction operates with a large negative ∆G and is essentially irreversible. (a) How do animal cells carry out the conversion of pyruvate to phosphoenol pyruvate? Give the reactants, products, (names or structures) and the name(s) of the enzyme(s) involved. Page Points 1 ____ 2 ____ 3 ____ 4 ____ Total ______ (b) How do C-4 plant cells carry out this conversion? Give the reactants, products, (names or structures) and the name(s) of the enzyme(s) involved. (10) 2. Give the name and structure of the products formed when sedoheptulose-7-phosphate reacts with glyceraldehyde-3-phosphate in the presence of: (a) Transketolase (b) Transaldolase (4) 3. Wernicke-Korsakoffsyndrome is a mental disorder coupled with loss of memory and partial paralysis. It is an example of a condition dependent on both genetic and environmental factors, and involves transketolase. Explain the enzyme defect and the environmental factors involved.
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