The constitutive gene expression ( )
A. when there is inducer, expression will be higher
B. when there is inducer, expression will be lower
C. when there is repressor, expression will be higher
D. when there is repressor, expression will be lower
E. inducer and repressor have little effect on the expression
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Most of the gene expression occur in the ( )
A. replication level
B. transcription level
C. transcription initiation
D. translation level
E. post-translational level
Cis-acting element is ( )
A. TATA box and CCAAT box
B. DNA sequences that have regulatory function
C. 5′flanking sequence
D. 3′flanking sequence
E. non-coding sequence
A complete set of genes of a given species called ( )
A. genome
B. gene
C. DNA
D. chromosome E. cDNA
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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