第2题: [单项选择]大多数真核生物mRNA5′-端有() A. 帽子结构 B. B.poly C. Pribnow盒 D. 起始密码 E. 终止密码 参考答案:A 答案解析:考点:mRNA的结构。成熟mRNA的结构特点是5′-端有7-甲基鸟嘌呤-三磷酸鸟苷的帽子结构,3′-端有聚腺苷酸尾[poly(A)尾]。
第4题: [单项选择]In many cultures people who were thought to have the ability to ______ dreams were likely to be highly respected. A. interpret B. intervene C. inherit D. impact 参考答案:A 答案解析:[解析] 本题空格处是说具有圆梦的能力。A项interpret“解释,说明,口译”符合题意。其他三项intervene“干涉,干预,插入”:inherit“继承,遗传而得”;impact“挤入,撞击,