第四章单元测试
- Which of the following DNA damages belongs to exogenous DNA damage （ ）.
- Which type of DNA point mutations will not lead to the change in amino acid （ ）.
- which base substitution below belongs to “Transition” point mutation.（ ）
- Which is wrong below as described for directly undoing DNA damages repair.（ ）
- In which process GG-NER and TC-NER show different（ ）
- The deficiency of NER repair proteins is susceptible to_ disease.（ ）
- During mismatch repair in prokaryotes, the newly synthesized DNA is recognized by the lack of ( ) modification（ ）
- During double stranded DNA break repair, NHEJ shows more precise compared to HR. （ ）
- DNA damage is the main cause for the increased frequency of gene mutation. （ ）
- Base excision repair is one of DNA repair pathways to corrects large base lesions .（ ）
A:Instability of DNA structure B:Inaccuracy in DNA replication C:Endogenous Oxidative DNA damage D:Ionizing radiation
答案:Ionizing radiation
A:Missense mutation B:Nonsense mutation C:None of them D:Silent mutation
A:C→T B:A→C C:A→T D:G→T
A:There is no any DNA synthesis B:Pyrimidine dimer caused by UV can be repaired by directly undoing DNA damage repair process in human cells. C:O6-methylguanine methyltransferase can directly remove O6 alkylations on guanine residues by directly undoing DNA damage repair. D:Converting altered nucleotide back to original form.
A:DNA strand unwinding B:Nucleotides resynthesis C:DNA Strand excision D:DNA lesion recognition
A:Sickle HbC B:Lynch syndrome C:Chronic myelogenous leukemia D:Xeroderma pigmentosum
A:Deamination B:Methylation C:Acetylation D:Phosphorylation
A:错 B:对
A:错 B:对
A:错 B:对
温馨提示支付 ￥3.00 元后可查看付费内容,请先翻页预览!
