Nutrition_and_ metabolism_1999(supplementary_1)

Nutrition_and_ metabolism_1999(supplementary_1) -...

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THE UNIVERSITY OF HONG KONG BACHELOR OF SCIENCE: FINAL EXAMINATION ZOOLOGY: BIOL2510 / 20402 Nutrition and metabolism 20 December 1999 9.30 am- 11.30 am Part A: Compulsory short answer questions 1) Which macronutrient has the largest difference between heat of combustion and metabolizable energy. Explain. 2) Is di-homo- 7 -1inolenic acid an essential fatty acid? Explain. 3) Name the metabolic pathways which give rise to NADPH,. 4) Name the essential amino acids for human adults. 5) A diet consists of 30% energy as fat and half of the fat energy is derived from PUPA. Is this a healthy diet? Explain. -B: Answer ONE question 1) Discuss the metabolic condition(s) and functions of the key enzymes that effect gluconeogenesis. 2) Discuss
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Unformatted text preview: oxidation. Part C: Answer ONE question 1) Discuss the impacts and mechanisms of dietary fish oil on long chain fatty acid metabolism. 2) Discuss the formation and degradation of low density lipoprotein. Highlight the functions of the apoproteins. Part: Answer ONE question 1) Discuss the two major approaches used to determine nitrogen requirement in human adults. Explain why there is a discrepancy between the two approaches. An adult male weighing 70 kg has an habitual protein intake of 40 g per day. Do you think he is at risk of protein deficiency? Explain. 2) Outline the sources of ammonia and discuss mechanisms responsible for maintaining a low blood ammonia concentration. END OF PAPER...
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