29. In the following polypeptide, where might bends or turns occur? Where might intrachain disulfide cross-linkages be formed? Phe-Ala-His-Cys-Thr-Trp-Gly-Phe-Pro-Glu-Ser-Ala-Met-A rg-Trp-Glu-Ala-Asn-Asp-Gly- Pro-Met-Glu-Ala-Phe-Cys-His-Arg-

27. Draw the tetrapeptide Tyr-Asp-Ile-Met at physiological pH.

28. You wish to determine the sequence of a short peptide. Cleavage with trypsin yields three smaller peptides with the sequences Leu-Glu, Gly-Tyr-Asn-Arg, and Gln-Ala-Phe-Val-Lys. Cleavage with chymotrypsin yields three peptides with the sequences Gln-Ala-Phe, Asn-Arg-Leu-Glu, and Val-Lys-Gly-Ty. What is the sequence of the intact peptide?

31. Please determine the pI of the following peptides: Lys-His-Trp-Ser-Gly-Gly-Leu-Arg-Pro-Gly

32. Please describe the biological functions of co-enzyme Q and Q cycle in mitochondria?

33. Please provide an explanation why fatty acid catabolism can turn off glycolysis and turn on gluconeogenesis?

34. What is the process of glycogen biosynthesis from glucoses?

35. What is the biosynthesis of heme?

7. While the plasma membrane is a dynamic fluid, its lipid composition is highly asymmetrical. Discuss the physiological significance of Phosphatidylinositol (PI) and its phosphorylated derivatives being sequestered specifically in the inner (cytoplasmic) leaflet ofthe membrane bilayer. In your answer, explain how this localization facilitates the PLC-mediated signaling pathway and analyze the consequences for cellular signaling if this asymmetry were lost.

6. The urea cycle occurs in two different cellular compartments of the hepatocyte. Name these compartments, identify which enzyme catalyzes the rate-limiting step, and name the essential allosteric activator required for that enzyme's function.

5. Explain how the urea cycle is metabolically connected to the Citric Acid (TCA) cycle. Identify the specific intermediate produced in the cytosol that serves as this link and describe its fate.

115年 - [無官方正解]115 國立臺灣大學_ 碩士班招生考試試題：生化學#137639

114年 - [無官方正解]114 國立臺灣大學_碩士班招生考試：生化學#125977

113年 - 113 國立臺灣大學_碩士班招生考試：生化學#118908

112年 - 國立臺灣大學_碩士班招生考試_生物化學暨分子生物學研究所:生化學#113391

110年 - 110 國立臺灣大學_碩士班招生考試_生物化學暨分子生物學研究所:生化學#105531

110年 - 顧中生化題庫#99403