Quiz10_Spr07 - Biochemistry 3020 Instructor Dr H-J Wieden...

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Biochemistry 3020 Quiz 10 2007-Apr-5 Instructor: Dr. H.-J. Wieden 12:15 – 12:30 Name:_____________________ ID#:__________________ Page:1/2 1.) Avidin, a protein in egg whites, binds biotin very tightly and prevents its absorption in the intestine. Consumption of large amounts of raw eggs can result in a biotin deficiency. Which of the following metabolic conversions cannot occur without biotin? (Note: This is not a problem with cooked eggs because cooking denatures avidin.) A) Oxaloacetate phosphoenolpyruvate B) 1,3-Bisphosphoglycerate glyceraldehyde-3-phosphate C) Fructose-1,6-bisphosphate fructose-6-phosphate D) Pyruvate oxaloacetate E) Phosphoenolpyruvate 2-phosphoglycerate \ 2.) The net energetic cost of converting two pyruvate to one glucose by gluconeogenesis is ______ ATP equivalents. A) 2 B) 3 C) 4 D) 5 E) 6 3.) The metabolic conversion of oxaloacetate to phosphoenolpyruvate, which is catalyzed by PEP carboxykinase, requires ______ as the free energy source. A)
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This note was uploaded on 06/02/2009 for the course CHEMISTRY bioc 2020 taught by Professor Mr.portvin during the Spring '09 term at Indian Institute of Technology, Chennai.

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Quiz10_Spr07 - Biochemistry 3020 Instructor Dr H-J Wieden...

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