关于转录的叙述不正确的是（）。
A.模板链的方向总是3′→5′
B.转录只发生于基因组的部分基因序列
C.在一个多基因的DNA双链中各基因的模板不是总在一条链上
D.结构基因的DNA双链中只有一条链可以作为模板
E.转录具有校读功能
参考答案：E
解析：RNA聚合酶无3′→5′外切酶活性，不具备校读功能，所以RNA合成的错误率比DNA合成高得多。
sightings of puzzling lights in the key and reports of alien visits around the time of his 小题3:__________. His sister Kelly recalled that standing inside were lots of strange 小题4:___________with white skin and large black eyes. She was frightened. But his mother 小题5:._________ Kelly was having a dream and sent her to bed. Police have 小题6:. _________ the possibility that Justin was taken by aliens, but are also looking into other possibilities. Detective Sam Peterson, who has taken charge of the case, thought that people sometimes 小题7:.__________amazing stories, and there might be other possibilities such as murder. There is really no hard evidence that aliens took him away. They wouldn’t give up until they found 小题8:.____________ evidence. |