Test3(1)

Test3(1) - BCH 4053 Points(6 1 HOUR TEST 3 NAME Name the...

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BCH 4053 April 13, 2001 HOUR TEST 3 NAME_____________________ Points (6) 1. Name the six classes of enzymes according to the International Commission on Enzymes: Page Points 1 ____ 2 ____ 3 ____ 4 ____ Total ______ (6) 2. Following are a few enzymes we have studied. In the blank to the left of the enzyme, indicate which of the classes from question 1 that the enzyme would fall under. _______________ chymotrypsin ___________________ phosphofructokinase _______________ enolase ___________________ lactate dehydrogenase _______________ phosphoglyceromutase ___________________ aspartic protease (8) 3. Lysozyme catalyzes hydrolysis of the bacterial cell wall, cleaving the bond between muramic acid and N-acetylglucosamine. Asp-52, with a pK a of 4.5, and Glu-35, with a pK a of 5.9, are important functional groups involved in the catalytic mechanism. The pH optimum of lysozyme is 5.2. (a) What accounts for the unusual pK a of the glutamate residue? (b) Which group will be protonated, and which unprotonated in the active enzyme? (c) What role does the unprotonated group play in the catalytic mechanism? (7)
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This note was uploaded on 05/22/2011 for the course BCH 4053 taught by Professor Logan during the Fall '06 term at FSU.

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Test3(1) - BCH 4053 Points(6 1 HOUR TEST 3 NAME Name the...

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