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【单选题】
What is the annealing temperature of the PCR?（ ）
A.
72℃
B.
94℃
C.
55℃
D.
95 ℃
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【单选题】If a gene is expressed only in certain organs or tissues, this is called （ ）
A.
stage specificity of gene expression
B.
none of the above
C.
spatial specificity of gene expression
D.
temporal specificity of gene expression
【多选题】What are the steps of PCR?（ ）
A.
Extension
B.
Annealing
C.
Transformation
D.
Denaturation
相关题目：
【单选题】If a gene is expressed only in certain organs or tissues, this is called （ ）
A.
stage specificity of gene expression
B.
none of the above
C.
spatial specificity of gene expression
D.
temporal specificity of gene expression
【多选题】What are the steps of PCR?（ ）
A.
Extension
B.
Annealing
C.
Transformation
D.
Denaturation
参考解析：
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