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一、单项选择题:每小题给出的四个选项中,只有一个选项最符合题意。1.经检测,刚挤出的牛奶中有两种分子式分别为C_(12)H_(22)O_(11)和C_(1864)H_(3012)N_(168)O_(221)化学物质,它们分别是()A.葡萄糖和蛋白质B.蔗糖和蛋白质C.脂肪和核酸D.乳糖和蛋白质2.下图表示有关蛋白质分子的简要概
First, single-choice questions: Among the four options given for each question, only one of the options is the best. 1. After testing, there are two chemical formulas in the freshly extruded milk: C_(12)H_(22)O_(11) and C_(1864)H_(3012)N_(168)O_(221) chemicals. They are () A. Glucose and Protein B. Sucrose and Protein C. Fat and Nucleic Acid D. Lactose and Protein 2. The figure below shows a brief overview of the relevant protein molecules.