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
查看答案
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
Most genes in prokaryotes are in the form of operons. So why don't eukaryotes have operons?()
A. Eukaryotes regulate gene expression by repressor protein
B. The mRNA of prokaryote is read from 5 'to 3', whereas,in eukaryote,mRNA is read from 3 'to 5'
C. There is only one binding site between ribosome and mRNA in eukaryotes
D. Eukaryotes can't transcribe and translate at the same time
Eukaryotic promoter can not bind to RNA polymerase
微信支付 
支付宝支付