1. 下列何者為真？(A) Liquid and solid water have the same number of hydrogen bondsper molecule of water.(B) Liquid water has more hydrogen bonds per molecule than doessolid water.(C) Solid water has more hydrogen bonds per molecule than doesliquid water.(D) Hydrogen bonding is a major factor in the structure of gaseouswater.(E) None is true.

5. 下列混合物包含 urease (pI = 5.1, mol. wt. 482,700), catalase (pI = 5.6,mol. wt. 247,500), lactoglobin (pI 5.2, mol. wt. 37,100) 及hemoglobin(pI 6.9, mol. wt. 64,500) 四種蛋白質，當用 pH 6.5 buffer通過帶正價的DEAE-cellulose chromatography column 層析管柱後會依序流出，其前後次序為何？(A) urease, lactoglobin, catalase, hemoglobin(B) hemoglobin, catalase, lactoglobin, urease(C) urease, catalase, hemoglobin, lactoglobin(D) lactoglobin, hemoglobin, catalase, urease(E)cannot be determined from the information given

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