题目内容

下列酶中,重组DNA 技术常用的是

A. 引物酶
B. 逆转录酶
C. DNA 解旋酶
D. RNA 聚合酶
E. DNA 拓扑异构酶

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关于 DNA 连接酶

A. 不参与 DNA复制
B. 催化合成冈崎片段
C. 催化连接冈崎片段
D. 切除引物,填补缺口
E. 连接游离的单链 DNA

This is our company brochure, and this isthe project plan, please takea look at it first.

A. 对
B. 错

A: Hello, Judy, thank you for your waiting, _____________ ?B: Not bad, ______________?A: Good.

A. How are you, How do you do
B. How are you, How are you
C. How do you do, How do you do
D. How do you do, How are you

We really value the chance to work with you. I do hope we can meetthe next timewhen I came back.

A. 对
B. 错

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