CH369 exam4s98 - CH 369, Exam 4 Spring 1998 Multiple choice...

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1 CH 369, Exam 4 Spring 1998 Multiple choice questions are each worth 2 pts. 1 . The glutamate family of amino acids includes all of the following except _____ . A. Glutamine B. Arginine C. Lysine D. Proline E. None of the above are correct. 2. (4 pts) A molecule of palmitic acid, attached to carbon 1 of the glycerol moiety of a triacylglycerol, is ingested and digested. It passes into the blood, stored in a fact cell and ultimately is oxidized to carbon dioxide and water by a muscle cell. Choose the molecular complex in the following movements of the palmitic acid. ( Note that not all answers may be used or an answer may be used more than once) ____From the lumen of the gut to the surface of the gut epithelial cell. A. VLDL ____ From the gut epithelial cell to the blood. B. chylomicron ____From the blood in the intestine to a fat cell. C. fatty-acid albumin complex _____From a fat cell to a muscle cell. D. bile salt micelle E. LDL 3. Deficiency of _______ causes Lesch-Nyhan syndrome. A. Folic acid B. Carbamoylphosphate synthetase II C. UMP Synthase D. HGPRT E. Mg-protoporphyrin methylesterase 4. The end product of uracil degradation is _____ . A. Urea B. NH 4 + C. Allantoate D. β -Alanine E. β -Aminoisobutyrate 5. The fixation of N2 requires _____ . A. Fe-Mo protein B. Fe protein C. Ferredoxin D. Both A and B are correct. E. All of the above are correct. 6. Most aminotransferases utilize _______ as the recipient α -keto acid. A. α -Ketoglutarate B. Pyruvate C. Oxaloacetate D. Phenylpyruvate E. Imidazolepyruvate
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2 7. Saturated fatty acids containing up to 16 carbon atoms are assembled in _____ . A. Mitochondria B. Rough endoplasmic recticulum C. Smooth endoplasmic recticulum D. Peroxisomes E. Cytoplasm 8. Which amino acid degradation yields acetyl CoA _____ ? A. Threonine B. Glycine C. Glutamate D. Alanine E. Cysteine 9. The end product of thymine degradation is _____ . A. Urea B. NH 4 + C. Allantoate D. β -Alanine E. β -Aminoisobutyrate 10. (4 pts) Match the following descriptions with the appropriate lipid (( Note that not all answers may be used or an answer may be used more than once ). ____ Oxidized by the brain during prolonged starvation. A. palmitate ____ Produced from acetyl CoA by most cells in the body. B. acetoacetate ____ Efficiently recycled by the liver. C. cholesterol ____ Produced by the liver during fasting. D. bile salts 11. All of the following are involved in the synthesis of deoxyribonucleotides except _____ . A.
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This note was uploaded on 03/30/2010 for the course CH 369 taught by Professor Kbrowning during the Spring '07 term at University of Texas.

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CH369 exam4s98 - CH 369, Exam 4 Spring 1998 Multiple choice...

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