皮皮学，免费搜题
登录
搜题
【单选题】
根据某基因上游和下游的碱基序列,设计合成了用于该基因 PCR 的两段引物(单链 DNA)。引物与该基因变性 DNA(单链 DNA)结合为双链 DNA 的过程称为复性。下图是两引物的 Tm(引物熔解温度,即 50%的引物与其互补序列形成双链 DNA 分子时的温度)测定结果,下列叙述错误的是( )
A.
通常引物 1 和引物 2 不能有碱基互补配对关系
B.
两引物分别是子链延伸的起点,并可以反复利用
C.
若两引物的脱氧核苷酸数相同,推测引物 2 的 GC 含量较高
D.
复性所需温度与时间,取决于引物的长度、碱基组成及其浓度等因素
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【判断题】不同震级,释放的地震作用是不同的,所以地震作用属于可变作用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】who came to London?
A.
daming
B.
Peter
C.
London
D.
chinese
查看完整题目与答案
【单选题】Who came to London to get rich?
A.
Sherlock Holmes
B.
Guy Fawkes
C.
Dick Whittington
查看完整题目与答案
【单选题】The word radiculoneurocele possibly means?
A.
protrusion of nerve root
B.
softening of spinal cord
C.
hardening of brain stem
D.
the protrusion of neural cell
查看完整题目与答案
【单选题】That is the cook ______ came from London.
A.
that
B.
which
C.
/
D.
Who
查看完整题目与答案
【简答题】You must shine your shoes.
查看完整题目与答案
【单选题】下面对于鱼类眼睛的说法错误的是()。
A.
鱼类没有眼睑,不能闭眼
B.
鱼类的眼睛可以看到很远
C.
鱼类的眼睛只能小幅度转动
D.
在深海的鱼眼睛往往比较小
查看完整题目与答案
【单选题】That is the cook ______ came from London. [     ]
A.
that
B.
which
C.
/
D.
who
查看完整题目与答案
【简答题】Write a 200-word essay on your preference for one kind of technology to the others: “ The Coolest Latest Tech for Me ”. --You must write in no less than 200 words. (1) --You must include a thesis stat...
查看完整题目与答案
【单选题】Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or caps. The installation process of these bearings requires sufficient....
A.
overlap
B.
crush
C.
lap or lead
D.
protrusion
查看完整题目与答案
相关题目：
【判断题】不同震级,释放的地震作用是不同的,所以地震作用属于可变作用。
A.
正确
B.
错误
查看完整题目与答案
【单选题】who came to London?
A.
daming
B.
Peter
C.
London
D.
chinese
查看完整题目与答案
【单选题】Who came to London to get rich?
A.
Sherlock Holmes
B.
Guy Fawkes
C.
Dick Whittington
查看完整题目与答案
【单选题】The word radiculoneurocele possibly means?
A.
protrusion of nerve root
B.
softening of spinal cord
C.
hardening of brain stem
D.
the protrusion of neural cell
查看完整题目与答案
【单选题】That is the cook ______ came from London.
A.
that
B.
which
C.
/
D.
Who
查看完整题目与答案
【简答题】You must shine your shoes.
查看完整题目与答案
【单选题】下面对于鱼类眼睛的说法错误的是()。
A.
鱼类没有眼睑,不能闭眼
B.
鱼类的眼睛可以看到很远
C.
鱼类的眼睛只能小幅度转动
D.
在深海的鱼眼睛往往比较小
查看完整题目与答案
【单选题】That is the cook ______ came from London. [     ]
A.
that
B.
which
C.
/
D.
who
查看完整题目与答案
【简答题】Write a 200-word essay on your preference for one kind of technology to the others: “ The Coolest Latest Tech for Me ”. --You must write in no less than 200 words. (1) --You must include a thesis stat...
查看完整题目与答案
【单选题】Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or caps. The installation process of these bearings requires sufficient....
A.
overlap
B.
crush
C.
lap or lead
D.
protrusion
查看完整题目与答案