第四章单元测试
What's the Chinese for nonsense mutations?（ ）
The most important form causing DNA damage is （ ） which produces pyrimidine dimers from adjacent pyrimidine bases.
- ______ of the DNA after replication allows the daughter strand to be distinguished from the parental strand.（ ）
- Homologous recombination is also important for DNA repair. This mechanism has also been called _____.（ ）
判断：The gene into which the transposon inserts is usually activated, and genes between two copies of a transposon can be deleted by recombination between them.（ ）
A:沉默突变 B:无义突变 C:都不是 D:错义突变
答案:无义突变
A:γ-rays B:Visible light C:X-rays D:UV light
A:Acetylation B:Hemimethylation C:Phosphorylation D:Methylation
A:replication repair B:post-replication repair C:pre-replication repair D:None of the above
A:对 B:错
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