As a cell replicates, the foreign DNA is absorbed and the genes in question are modified by the non-matching short sequences.
当细胞复制时，外来基因被吸收，相关基因被非配对短序列修饰。
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The techniques they use — removing DNA from bacterial cells, manipulating them using enzymes and returning them to a new cell — are similar to those used to create genetically modified foods.
A PAH was added to the subject's cigarettes, which was then modified by the body and turned into another chemical which damages DNA and has been linked with cancer.