题目内容

在DNA复制中RNA引物的作用是( )

A. 使DNA聚合酶Ш活化
B. 使DNA双链解开
C. 提供5’-P末端作合成新DNA链起点
D. 提供3’-OH末端作合成新RNA链起点
E. 提供3’-OH末端作合成新DNA链起点

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DNA复制之初,参与从超螺旋结构解开双股链的酶或因子是( )

A. 解旋酶
B. 拓扑异构酶I
C. DNA结合蛋白
D. 引发前体
E. 拓扑异构酶Ⅱ

What are the coding schemes in the olfactory system and peripheral gustatory system?

A. (A) both are labeled-line coding
B. (B) both are population coding
C. (C) olfactory system is population coding while peripheral gustatory system is labeled-line coding
D. (D) olfactory system is labeled-line coding while peripheral gustatory system is population coding

Which is not the function of dorsal stream of the auditory cortical system?

A. (A) specializes in sound-source localization
B. (B) identifies auditory objects
C. (C) detects sound-source motion
D. (D) segregates spatial sound sources

Which brain area is responsible for controlling saccadic eye movement?

A. (A) superior colliculus
B. (B) caudate nucleus
C. (C) substantia nigra pars reticulata
D. (D) substantia nigra pars compacta

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