题目

阅读下面短文，从短文所给各题的四个选项A、B、C和D中，选出可以填入空白处的最佳选项。 A 17-year-old girl was heading abroad, with her closerelatives sending her off at the airport. She had six suitcases. All therelatives were 1to see such a young child carry theheavy luggage alone. But they knew she would have to2 it all by herself when transferring inCalifornia to New York, so it was better for her to get used to it now. For her worried parents, the two-hour wait seemed endless. Theywere extremely careful about their words3a single question might induce ( 分析以下图解，回答下列问题： （1）图中构成D的四种碱基的中文名称分别是                                                                                                                        ，G表示                    。 （2）H是遗传物质的主要载体， E在H上呈                                   排列，1个H含有                    个F。 （3）在F的复制过程中，碱基之间的                             打开，双螺旋链解开成为两条单链，并以每一条单链为模板，采用                       复制方式合成子代F分子。 （4）某基因中的一段序列为……TAT GAG CTC GTGATA……，据下表提供的遗传密码推测其编码的氨基酸序列：                                                                              。 密码子 CAC UAU AUA CUC GUG UCC GAG 氨基酸 组氨酸 酪氨酸 异亮氨酸 亮氨酸 缬氨酸 丝氨酸 谷氨酸