题目

The story happened during the Second World War. An old man lived in a small town of Germany. He had three sons and they all worked in the same factory where he had worked. After the war had begun, his sons were all made to join the army one after another and they all died in the fights. The old man was very sad. He didn’t have enough food and was often hungry. And nobody helped him and he didn’t know how to go on living. It was a very cold winter night. The old man couldn’t go to sleep. He had been hungry for two days and it was so cold in his room that ice could be seen. He had t(2008广东，单科卷，30)请回答以下有关细胞物质组成和功能的问题： （1）细胞中含有N元素的生物大分子是 A．核苷酸和糖原                             B．胰岛素和核酸 C．氨基酸和胰高血糖素                   D．血红蛋白和纤维素 （2）细胞中的糖类可以分为3类，其中可以被消化道直接吸收的是                 。完全由葡萄糖缩合而成的二糖是                   。 （3）构成细胞膜的脂质是              和              。 （4）癌细胞转移与细胞膜上                  减少有关。