Among the operons with weak regulation, the mutation that causes the overexpression of the product gene is most likely to occur in()?
A. operatorgene
B. RNA 3 'terminal sequence
C. RNA 5 'terminal sequence
D. RNA intron
E. Coding genes of trans-acting element
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What can be used when an oligonucleotide containing a damaged base is produced in a cell?()
A. Photoreactivation repair
B. Excision repair
C. Recombination repair
D. SOS repair
E. Mismatch repair
Which one of the following repair processes is used to determine the chain to be repaired depending on the methylation state of the chain?()
A. Photoreactivation repair
B. Excision repair
C. Recombination repair
D. SOS repair
E. Mismatch repair
Which following repair methods is usually introduced gene mutation?()
A. Photoreactivation repair
B. Excision repair
C. Recombination repair
D. SOS repair
E. Mismatch repair
What are the advantages of prokaryote genes in the form of operons?()
A. Multiple genes can always be duplicated by a piece of DNA
B. Related genes can be regulated by the same environmental signals
C. RNA polymerases can bind to multiple sites within a gene
D. Ribosomes only need to be combined once to allow all genes to translate large proteins
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