所屬科目:研究所、轉學考(插大)◆生化學
2. A graduate student is trying to separate protein S from other proteins in a solution. The proteins have the following properties: Please devise effective methods for getting pure protein S. (6%)
1)What is the common molecule that these 5 hormones may be derived from? (2%)
5. In which direction along the template must the RNA polymerase in Figure below be moving to have generated the supercoiled structures that are shown? Would you expect supercoils to be generated if the RNA polymerase were free to rotate about the axis of the DNA as it progressed along the template? (4%)
6. Why is the drug azidothymidine (AZT) block the growth of the AIDS virus HIV. (2%)
13. Describe the figure below. Note: it starts from amino acids. What are the diseases associated with it? How does one deal with the diseases? Can the urea cycle work alone? What are the roles of oxaloacetate? What does the cell do when oxaloacetate is used up by the urea cycle? (8%)