题目
单项选择题
Question9 Which option below best describes the process or concept depicted in the image above? Select one alternative: Proof-reading mechanism of E. coli DNA Polymerase I Semi-discontinuous model of DNA replication Nucleophilic attack in DNA Polymerase mechanism of action RNA primer removal mechanism of E. coli DNA Polymerase I ResetMaximum marks: 1 Flag question undefined
选项
A.Proof-reading mechanism of E. coli DNA Polymerase I
B.Semi-discontinuous model of DNA replication
C.Nucleophilic attack in DNA Polymerase mechanism of action
D.RNA primer removal mechanism of E. coli DNA Polymerase I
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思路分析
The question asks which option best describes the process or concept depicted in the image.
Option 1: 'Proof-reading mechanism of E. coli DNA Polymerase I' — This focuses on the exonuclease proofreading activity of Pol I, which ensures fidelity by removing mispaired nucleotides. The image shows the overall replication process with leading and lagging strands forming a replication fork, not the specific proofread......Login to view full explanation登录即可查看完整答案
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Dr. Dre has decided that he wants to cure cancer and so has designed a bunch of compounds to inhibit various enzymes involved in DNA replication. He tests each of the 5 compounds against the enzymatic activity of each of the DNA replication enzymes and records what each one does to work out what they do. He concludes that [ Select ] Compound B Compound E Compound D Compound A Compound C would prevent the replacement of RNA sequences with DNA, while [ Select ] Compound B Compound C Compound D Compound A Compound E would prevent all steps in DNA replication. He predicts that [ Select ] Compound E Compound D Compound B Compound C Compound A would leave the replicated DNA strand as a series of separate DNA fragments, but that [ Select ] Compound A Compound B Compound D Compound E Compound C would lead to the death of the cell upon DNA replication. Finally, he concludes that [ Select ] Compound D Compound C Compound A Compound E Compound B would prevent the formation of both the leading and lagging strands.
Dr. Dre has decided that he wants to cure cancer and so has designed a bunch of compounds to inhibit various enzymes involved in DNA replication. He tests each of the 5 compounds against the enzymatic activity of each of the DNA replication enzymes and records what each one does to work out what they do. He concludes that [ Select ] Compound A Compound D Compound E Compound B Compound C would prevent the replacement of RNA sequences with DNA, while [ Select ] Compound C Compound B Compound E Compound A Compound D would prevent all steps in DNA replication. He predicts that [ Select ] Compound A Compound E Compound B Compound C Compound D would leave the replicated DNA strand as a series of separate DNA fragments, but that [ Select ] Compound C Compound D Compound B Compound E Compound A would lead to the death of the cell upon DNA replication. Finally, he concludes that [ Select ] Compound B Compound C Compound A Compound E Compound D would prevent the formation of both the leading and lagging strands.
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