题目

下列有关基因工程中限制酶的描述，错误的是 A．一种限制酶只能识别一种特定的脱氧核苷酸序列    B．限制酶的活性受温度的影响 C．限制酶能识别和切割RNA                         D．限制酶可从原核生物中提取 答案：C If you are _______ about Australian cities, just read the book by Dr. Johnson, which introduces them in detail.       A．interested B．anxious C．curious D．upset