On the question of DNA recombination technology (genetic engineering), New curriculum reform biology compulsory 2 102 pages of content, there are books can refer to the next Excuse me, if the restriction enzyme can only recognize a specific DNA sequence, isn't the required DNA cut off by the restriction enzyme the same as the DNA cut off from the gene carrier to be replaced? What's the purpose of replacement? Also, if it's not the same, the original base sequence may be changed after replacement, isn't it? You're sure it's "the end is the same, not the whole.". The book says that it can specifically identify sequences, such as EcoRI can transfer and identify gaattc sequences.

On the question of DNA recombination technology (genetic engineering), New curriculum reform biology compulsory 2 102 pages of content, there are books can refer to the next Excuse me, if the restriction enzyme can only recognize a specific DNA sequence, isn't the required DNA cut off by the restriction enzyme the same as the DNA cut off from the gene carrier to be replaced? What's the purpose of replacement? Also, if it's not the same, the original base sequence may be changed after replacement, isn't it? You're sure it's "the end is the same, not the whole.". The book says that it can specifically identify sequences, such as EcoRI can transfer and identify gaattc sequences.

The DNA sequence recognized by it refers to the incision, not the whole gene. How can the gene be so short? After recognizing such a incision sequence, it is cut at a specific site to expose the sticky end, and then the gene fragment with the same sticky end can be connected. The replacement part should be at least one gene and a foreign gene, so that the foreign gene can be expressed

Benefits of genetic engineering technology to human beings

1. The application of genetic engineering technology can not only cultivate high-quality, high-yield, good resistance crops and new varieties of livestock and poultry, but also cultivate animals and plants with special uses. 2. DNA probes made by genetic engineering can be very sensitive to detect environmental viruses, bacteria and other contamination