Which of the following statement is NOT correct about the non-homology end joining repair after the break of the double strands in mammal cells?()
A. The repair needs DNA-dependent protein kinase to activate nuclease Artemis
B. The terminal of DNA needs the protection of proteins such as Ku70, Ku86 etc.
C. The repair can happen at any period of cell cycle
D. Independent of DNA homology, the repair forces the two DNA broken ends to link together
E. The repair can result in exchanges between the chromosome arms but usually will not influence the expression of the relevant genes
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In prokaryotic cell,the main function of protein RecA in genetic recombination is:()
A. To promote the autosynapsis and single-strand exchange between DNA molecules
B. To disassociate the single strand from the duplex DNA molecule
C. Possessing activity of cutting the single strand DNA at specific site
D. To promote the formation of the single strand DNA
Which of the following repair cannot fundamentally eliminate DNA structural damage:()
A. nucleotide excision repair
B. mismatch repair
C. photoreactivation repair
D. recombination repair
Nucleotide excision repair system is similar with mismatch system in replication process, both of which recognize the twisty DNA double helix as damaged site. So the same protein complex can be used to find damaged sites in these two system.()
The depurination sites of DNA strand can be repaired by directly addition of bases to pentose by specific glycosylase based on complementary base pairing.()
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