题目内容

Among the responses of cells to DNA damage, which is most likely to lead to high mutation rate:()

A. Photoreactivation repair
Base excision repair
C. Recombination repair
Damage-removing synthesis

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Four steps are involved in most of DNA repairs. The correct order of the four steps is:()

A. recognition、excision、re-synthesis、re-ligation
B. re-ligation、re-synthesis、excision、recognition
C. excision、re-synthesis、re-ligation、recognition
D. recognition、re-synthesis、re-ligation、excision

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In photoreactivation repair, which of the following enzyme binds to pyrimidine dimer?()

A. Photolyase
B. Exonuclease
C. Endonuclease
D. Ligase

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Which enzyme is not needed during base excision repair:()

A. DNA polymerase
B. Phosphodiesterase
C. Exonuclease
D. Ligase
E. Glycosylase

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The DNA strand containing pyrimidine dimer can still functions as a template during replication. When replication fork meets damaged site, the synthesis of nascent strand will be completed by which of the following enzyme:()

A. DNA polymerase I
B. DNA polymerase III
C. RecA
Damage-removing synthase

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Among the responses of cells to DNA damage, which is most likely to lead to high mutation rate:()

A. Photoreactivation repair Base excision repair C. Recombination repair Damage-removing synthesis

Four steps are involved in most of DNA repairs. The correct order of the four steps is:()

In photoreactivation repair, which of the following enzyme binds to pyrimidine dimer?()

Which enzyme is not needed during base excision repair:()

The DNA strand containing pyrimidine dimer can still functions as a template during replication. When replication fork meets damaged site, the synthesis of nascent strand will be completed by which of the following enzyme:()

A. Photoreactivation repair
Base excision repair
C. Recombination repair
Damage-removing synthesis