题目

如图为染色体与DNA的关系示意图。有关叙述错误的是( ) A . 染色体由蛋白质分子和DNA分子组成 B . 一条染色体上有多个蛋白质分子 C . 基因是有遗传效应的DNA片段 D . 一个细胞内，染色体数与基因数相等 答案：D He was robbed last night, but he didn’t have much on him then． [　　] A．fortunately B．eventually C．certainly D．surprisingly