熱門科目
最新試題
- 4. Please compare the carbamoyl-phosphate synthetase I and II according to their substrates; intracellular locations; involved pathways; key reactions? (15%)
- 3. Please plot the structure of arachidonic acid (C20:4Δ6). Please depict how arachidonic acid is synthesized from linoleic acid (C18:2Δ6) in mammals. Please describe your answer including "Δ5 desaturase”, “Δ6 desaturase”, and “elongation". Please define the structure of each intermediate. (15%)
- 2. What changes are caused in the various steps of oxidative phosphorylation when mitochondria are treated with the following compounds: (1) KCN; (2) 2,4-dinitrophenol; (3) oligomycin. (15%)
- 20. The reaction, ATP + AMP → 2ADP, is catalyzed by:
(A) adenylate phosphorylase,
(B) AMP-phosphotransferase,
(C) ADP mutase,
(D) adenylate kinase,
(E) none are true.
- 19. Ornithine serves three metabolically important roles, but is not found in proteins. What is one of the important roles of ornithine?
(A) precursor in the synthesis of aspartate,
(B) an intermediate in the urea cycle,
(C) formation of ornithine from serine,
(D) it condenses with aspartate to form argininosuccinate,
(E) it is derived from glutamate-5-phosphate.
- 18. Glutamine synthetase (GS) belongs to what class of enzymes?
(A) isomerases,
(B) oxidoreductase,
(C) ligase,
(D) lyase,
(E) transferase.
最新情報
最新試卷
最新行事曆
其他資訊