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【单选题】
In lac operon, repressor protein could bind to( )sequence.( )
A.
lac Z
B.
promoter
C.
lac I
D.
operator
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A.
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B.
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【判断题】Eukaryotic transcriptions is accompanied by translation.( )
A.
正确
B.
错误
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【多选题】What are the solutions used in the experiment?( )
A.
70% ethanol
B.
Isopropanol
C.
Phenol/chloroform/ Isopropanol(25/24/1)
D.
TE buffer
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A.
正确
B.
错误
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A.
正确
B.
错误
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【单选题】Plasmids are usually introduced into bacterial cells by.( )
A.
Transfection
B.
Infection
C.
Transformation
D.
Transduction
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【判断题】Protein chip technology has the characteristics of fast and high throughput, it can be used to analyze thousands of proteins in the whole genome level at the same time.( )
A.
正确
B.
错误
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【判断题】The genetic code has four letters, A, T, G, and C. ( )
A.
正确
B.
错误
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【单选题】In the regulation of lac operon, when the medium contains only glucose, which statement is true?( )
A.
concentration of cAMP is high, CAP is active
B.
concentration of cAMP is low, CAP is active
C.
concentration of cAMP is high, CAP is inactive
D.
concentration of cAMP is low, CAP is inactive
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【判断题】老年人健康评估与成年人的健康评估基本一致。( )
A.
正确
B.
错误
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