The following statements about structural genes in eukaryotes are incorrect ( )
A. Structural genes are mostly broken genes
B. Transcription of structural genes is discontinuous
Contains a large number of repeated sequences
D. Structural genes make up a small proportion of the genome
E. The products are mostly mono-cistron RNA
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when we diagnose a certain autosomal recessive hereditary disease using Allele-specific oligonucleotide hybridization, if this sample can both hybridize normal probe and mutated probe, the sample is ( )
A. normal person
B. heterozygote patient
C. homozygote patient
D. carrier
E. cann’t ascertain
The enzyme that laboratory usually use to link exogenous DNA and vector DNA is ( )
A. DNA polymeraseⅠ
B. DNA polymeraseⅡ
C. DNA polymerase Ⅲ
DNA ligase
E. reverse transcriptase
The product of gene expression is ( )
A. DNA
B. RNA
C. protein
D. most are protein, some are RNA
E. enzyme and DNA
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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