Answer Happy

Department of Biological Sciences BIO 452 Intermediary and Cellular Metabolism Test 2013 (Deamination, Urea cycle, Breakdown of amino acids, Heme) 1. The coenzyme of transaminations is a biotin b. pyridoxi phosphate c. thiamin d. riboflavin e. NAD+ 2. The key enzyme in oxidative deamination of amino acids is: a. L-amino acid oxidase b. D-amino acid oxidase c. glutamate dehydrogenase d. serine dehydratase e. threonine dehydratase 3. Name the major amino acid released by the muscle: a. Ser b. Cys c. Ala d. branched-chain amino acids e. Asp 4. Which of the listed enzymes is located in the mitochondrial matrix ?: a. aspartate transaminase b. argininosuccinate synthetase c. ornithine transcarbamoylase d. arginase e. argininosuccinate lyase 5. Breakdown of which amino acid gives fumarate as an end product ?: a. lle b. Argc. Tyr d. Ala e. Asn 6. Which of the listed amino acids is not glycogenic?: a. Ala b. Glu c. Asp d. Cys e. Leu 7. The toxic effect of ammonia is produced b: a. inhibition of transamination b. inhibition of the mit respiratory chain c. removal of a-ketoglutarate from the TCA cycle d. inhibition of glycolysis in the brain e. inhibition of GDH activity 8. Schiff's base is: a. a compound produced by the reaction between a carboxyl group and an amino group b. a compound produced by the reaction between an aldehyde group and a OH group c. a compound produced by the reaction between an aldehyde and an amino acid d. a compound produced by the reaction between an amino acid and ATP . 9. Name the enzyme catalyzing the following reaction: L-Glu + ATP + NH3 ------> L-Gln + ADP + P a. GDH b. Threonine dehydratase c. Serine dehydratase d. Glutamine synthetase e. Glutaminase 10. Vitamin B12 absorbed in the gut is transported in the bloodstream by: a. albumin b. cobalamin c. transcobalamin d. deoxyadenosylcobalamin e. intrinsic factor