题目

看图短文填空Jim's Family Tree I have a best friend. His name is Jim. There are nine people. His grandparents have two , his father and his . His parents have two sons and two .are Jim, Susan, Henry and Jane. So Jim has twoand a brother. Jim loves his family . 答案：【1】in【2】his【3】family【4】sons【5】uncle【6】daughters【7】They【8】sisters【9】very【10】much 下图为DNA分子结构示意图，请据图回答：                               （1）指出下列各部分名称： 1_________、2___________、4____________、6_________、7           （2）若以放射性同位素15N标记该DNA，则放射性物质位于___________________ (填标号)中。 （3）若水解该DNA获得其组成单体，则断裂的化学键位于____________（基团）之间。 （4）DNA是_________________的携带者，而每个个体DNA的_____________序列各有特点，决定了生物个体的特异性。