题目内容

受电弓一般采用驱动电机驱动。

A. 对
B. 错

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Lambda PL promoter is used in which vectors?

A.Cloning vectors
B.Expression vectors
C. Both cloning and expression vectors
D.Bacteriophage Mu

tac promoter is an example of which type of promoter?

A.hybrid promoter
B.fusion promoter
C.lacZ promoter
D.araBAD promoter

Expression of T7 promoter- lac operator hybrid requires ___________

A.T7 RNA polymerase
B.An inducer such as IPTG
C.Both T7 RNA polymerase and inducer such as IPTG
D.T7 DNA polymerase

Which of the following is a wrong statement?

A.To assume biological activity, many nascent polypeptides have to be covalently modified before or after the folding process
B.In eukaryotic cells most modifications take place in the endoplasmic reticulum and the Golgi apparatus
C.The modifications in eukaryotic cells include proteolytic cleavage; formation of disulfide bonds; addition of phosphoryl, methyl, acetyl, or other groups onto certain amino acid residues
D.The modifications in eukaryotic cells doesn’t include attachment of oligosaccharides or prosthetic groups to create mature proteins

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