题目内容

The repressor protein will bind to which part of the lactose operon ( )

A. promoter
B. operator
C. gene i
D. gene Y
E. gene Z

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Encoding product of the i gene of the lactose operon is ( )

A. one kind of activator protein
B. one kind of repressor protein
C. one kind of β-galactosidase
D. Permease
E. Transacetylase

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the principle of nucleic acid hybridization is ( )

A. phosphorylation
B. methylation
C. base complementary pairing
D. antigen and antibody reaction
E. ligand and receptor reaction

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the specificity of PCR depends on ( )

A. template
B. dNTPs
C. primer
D. Mg2+
E. buffer solution

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the correct process in PCR reaction should be ( )

A. annealing→denaturation→extension
B. denaturation →annealing→extension
C. annealing→extension→denaturation
D. denaturation→extension →annealing
E. extension →denaturation →annealing

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The repressor protein will bind to which part of the lactose operon ( )

A. promoter B. operator C. gene i D. gene Y E. gene Z

Encoding product of the i gene of the lactose operon is ( )

the principle of nucleic acid hybridization is ( )

the specificity of PCR depends on ( )

the correct process in PCR reaction should be ( )

A. promoter
B. operator
C. gene i
D. gene Y
E. gene Z