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Unformatted text preview: Exam 3 Spring 04 1. Integral membrane proteins interact extensively with the hydrocarbon chains of membranes lipids. Which amino acid sequence would provide the best interaction? a. Ser Tyr Thr Asn b. Asp Asn Arg Lys c. Lys Gly His Gln d. Phe Arg Ile Val e. Val Ala Gly Leu 2. What is the product of acetaldehyde metabolism? a. acetone b. acetoacetate c. ethanol d. alpha ketobutyric acid e. didealdehyde (which is then excreted) 3. In glycolysis, fructose 1, 6 diphosphate is split into two products. The number two carbon of fructose of 1, 6 diphosphate: a. becomes an aldose b. remains a ketose c. becomes a carboxylate d. becomes a hemiacetal e. remains an alcohol 4. Which enzyme of the citric acid cycle has a three point attachment with its substrate? a. Fumarase b. Aconitase c. Citrate synthase d. Malate dehydrogenase e. Succinyl CoA synthetase 5. Which of the following is FALSE for membranes? a. Membranes are sheetlike structures b. Membranes consists mainly of lipids and proteins c. Membranes are covalent assemblies d. Membranes are asymmetric e. Membranes are amphipathic 6. In glycolysis, how many reactions require inorganic phosphate as a substrate? a. one b. two c. three d. four e. none 2 7. The reaction of oxaloacetate to citrate catalyzed by citrate synthase is what type of reaction? a. Hydration b. Oxidation c. Decarboxylation d. Substrate level phosphorylation e. Condensation 8. How many of the following statements about fructose 2, 6 bisphosphate are true? I. It acts to inhibit glycolysis II. It is a glycolytic intermediate III. It is metabolized by a phosphatase IV. It is synthesized by a synthase V. It is induced by insulin VI. It is a competitive inhibitor of fructose isomerase a. none b. one c. two d. three e. four 9. If 4- 14 C-fructose 1, 6 diphosphate is treated with aldolase, the most immediate labeled reaction product will be: a. 1- 14 C-glyceraldehyde 3-phosphate b. 2- 14 C-glyceraldehyde 3-phosphate c. 1- 14 C-dihydroxyacetone phosphate d. 2- 14 C-dihydroxyacetone phosphate e. 3- 14 C-dihydroxyacetone phosphate 10. Biological membranes are not rigid, static structures. Which experiment proved to 10....
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This note was uploaded on 04/14/2010 for the course BHC 3023 taught by Professor Harmen during the Spring '10 term at University of South Florida - Tampa.
- Spring '10