题目内容

10. What advice does the writer give to people who want to succeed?______________________________________________________________________________

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11. Why does the writer say that success is a choice?Because success ______________, and unless you choose to work hard, success , for it doesn't _ by itself.

催化真核生物前体mRNA转录的酶是：

A. RNA复制酶
B. RNA聚合酶I
C. RNA聚合酶Ⅱ
D. RNA聚合酶Ⅲ
E. DNA聚合酶

对鹅膏蕈碱最敏感的酶是：

A. RNA聚合酶І
B. RNA聚合酶Ⅱ
C. RNA聚合酶Ⅲ
DNA聚合酶І
E. DNA聚合酶Ⅲ

真核生物mRNA转录后的加工不包括（）

A. 5'端加帽子结构
B. 3'端加polyA尾
C. 切除内含子
D. 连接外显子
E. 3'加CCA尾