例句與造句

1. To ensure that the genome successfully passes the information on, proofreading mechanisms such as exonucleases and mismatch repair systems are incorporated in DNA replication.
2. Furthermore, the template used is methylated while the mutant strand is unmethylated, and the mutants may be counter-selected due to presence of mismatch repair system that favors the methylated template DNA, resulting in fewer mutants.
3. It acts by adding alkyl groups to the O 6 of guanine and O 4 of thymine, which can lead to transition mutations between GC and AT . These changes do not cause a heavy distortion in the double helix of DNA and thus are hard to detect by the DNA mismatch repair system.
4. It's difficult to find mismatch repair system in a sentence. 用mismatch repair system造句挺難的