题目内容

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

查看答案
更多问题

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

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

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

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

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

The UvrAB complex in E.coli can recognize:()

A. Gaps between Okazaki fragments
B. Normal DNA molecule
C. Hemi-methylated GATC
D. Twisty DNA double helix

答案查题题库