DNA复制中冈崎片段最终生成随从链依靠的催化酶是
A. 拓扑异构酶
B. 单链DNA结合蛋白
C. 解螺旋酶
DNA结合酶
E. DNA连接酶
真核生物与原核生物在DNA复制中的相同之处是
A. 引物长度较短
B. 冈崎片段长度短
C. 合成方向自5′→3′
D. 有多个复制起始点
E. DNA复制的速度较慢(50nt/s)
将细菌培养在含有放射性物质的培养液中,使双链都带有标记,然后使之在不含标记物的培养液中生长三代,其结果是
A. 第一代细菌的DNA都带有标记
B. 第二代细菌的DNA都带有标记
C. 不出现两股链都带标记的子代细菌
D. 第三代多数细菌的DNA不带有标记
E. 其余选项都不对
Which of the following underlined parts modifies an adverb?
A. That's quite a story.
B. There's the house, right in front of you.
C. She cooks well enough.
D. There were quite a lot of people at his party.