“What’s your opinion on the matter, please?” “Oh, sorry, I _______.”
A. wasn’t to listen
B. haven’t listened
C. wasn’t listening
D. hadn’t listened
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“I suppose you _____ that report yet?” “I finished it yesterday, as a matter of fact.”
A. didn’t finish
B. haven’t finished
C. hadn’t finished
D. wasn’t finishing
2018U2-143 参与转录过程的酶是
A. DNA连接酶
B. 核酸内切酶
C. 引物酶
DNA聚合酶
E. RNA聚合酶
2018U2-144 仅在复制过程中合成短链RNA分子的酶是
A. DNA连接酶
B. 核酸内切酶
C. 引物酶
DNA聚合酶
E. RNA聚合酶
2002U4-88 关于DNA聚合酶的错误的是
A. 需要模板DNA
B. 需引物RNA
C. 延伸方向为5’到3’
D. 以NTP为原料
E. 具有3’到5’外切酶活性
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