皮皮学，免费搜题
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搜题
【单选题】
神经病理性疼痛治疗，应首选
A.
弱阿片类药物
B.
强阿片类药物
C.
非甾体类抗炎药物
D.
弱阿片类药物合并非甾体抗炎药物
E.
三环类抗抑郁药物或抗惊厥类药物
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【多选题】电泳的凝胶介质的高密度凝胶包括
A.
淀粉凝胶
B.
聚丙烯酰胺凝胶
C.
琼脂糖凝胶
D.
硅胶
查看完整题目与答案
【单选题】新生儿能从母体获得的 Ig 是
A.
IgG 和 IgA
B.
IgG 和 SIgA
C.
IgG 和 IgM
D.
IgG
E.
IgG 和 IgE
查看完整题目与答案
【判断题】DNA repair cannot be done without breaking the phosphodiester backbone of DNA.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following enzymes cannot catalyze the formation of a phosphodiester bond?
A.
endonuclease
B.
RNA polymerase
C.
DNA polymerase
D.
ligase
E.
none of the choices are correct.
查看完整题目与答案
【单选题】The final phosphodiester bond between the fragments is made by .
A.
DNA ligase
B.
DNA pol Ⅲ
C.
DNA pol Ⅰ
D.
DNA primase
查看完整题目与答案
【单选题】___________ restriction endonucleases, first isolated by Hamilton Smith in 1970, are r, require no ATP, and catalyze the hydrolytic cleavage of particular phosphodiester bonds in the DNA within ...
A.
Type I
B.
Type II
C.
Type III
D.
Type IV
查看完整题目与答案
【单选题】Which of the following would pr the formation of a phosphodiester bond in DNA?
A.
removal of a nitrogen from one of the bases
B.
removal of oxygen from carbon 2 of the sugar
C.
removal of an oxygen from carbon 3 of the sugar or removal of the phosphate from the gamma position of the nucleoside triphosphate
D.
removal of the phosphate from the alpha position of the nucleoside triphosphate
E.
removal of the phosphate at the beta position of the nucleoside triphosphate
查看完整题目与答案
【单选题】Depurination does not break the DNA phosphodiester backbone but instead removes a purine base from a nucleotide, giving rise to lesions that resemble missing _____.
A.
nose
B.
eyes
C.
teeth
D.
ears
查看完整题目与答案
【单选题】Once the two fragments are joined, the final sealing phosphodiester bond is formed by
A.
Polymerase
B.
exonuclease
C.
Transcriptase
D.
Ligase
查看完整题目与答案
【单选题】发电机电压等级为6 kV 的发电厂,其升高电压侧电力网电压等级为 110kV ,应选用额定电压比为 ___________ 的双绕组升压变压器。
A.
35 ／ 11kV
B.
38.5 ／ 6.3kV
C.
121 ／ 38.5 ／ 6.3kV
D.
121 ／ 6.3kV
查看完整题目与答案
相关题目：
【多选题】电泳的凝胶介质的高密度凝胶包括
A.
淀粉凝胶
B.
聚丙烯酰胺凝胶
C.
琼脂糖凝胶
D.
硅胶
查看完整题目与答案
【单选题】新生儿能从母体获得的 Ig 是
A.
IgG 和 IgA
B.
IgG 和 SIgA
C.
IgG 和 IgM
D.
IgG
E.
IgG 和 IgE
查看完整题目与答案
【判断题】DNA repair cannot be done without breaking the phosphodiester backbone of DNA.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following enzymes cannot catalyze the formation of a phosphodiester bond?
A.
endonuclease
B.
RNA polymerase
C.
DNA polymerase
D.
ligase
E.
none of the choices are correct.
查看完整题目与答案
【单选题】The final phosphodiester bond between the fragments is made by .
A.
DNA ligase
B.
DNA pol Ⅲ
C.
DNA pol Ⅰ
D.
DNA primase
查看完整题目与答案
【单选题】___________ restriction endonucleases, first isolated by Hamilton Smith in 1970, are r, require no ATP, and catalyze the hydrolytic cleavage of particular phosphodiester bonds in the DNA within ...
A.
Type I
B.
Type II
C.
Type III
D.
Type IV
查看完整题目与答案
【单选题】Which of the following would pr the formation of a phosphodiester bond in DNA?
A.
removal of a nitrogen from one of the bases
B.
removal of oxygen from carbon 2 of the sugar
C.
removal of an oxygen from carbon 3 of the sugar or removal of the phosphate from the gamma position of the nucleoside triphosphate
D.
removal of the phosphate from the alpha position of the nucleoside triphosphate
E.
removal of the phosphate at the beta position of the nucleoside triphosphate
查看完整题目与答案
【单选题】Depurination does not break the DNA phosphodiester backbone but instead removes a purine base from a nucleotide, giving rise to lesions that resemble missing _____.
A.
nose
B.
eyes
C.
teeth
D.
ears
查看完整题目与答案
【单选题】Once the two fragments are joined, the final sealing phosphodiester bond is formed by
A.
Polymerase
B.
exonuclease
C.
Transcriptase
D.
Ligase
查看完整题目与答案
【单选题】发电机电压等级为6 kV 的发电厂,其升高电压侧电力网电压等级为 110kV ,应选用额定电压比为 ___________ 的双绕组升压变压器。
A.
35 ／ 11kV
B.
38.5 ／ 6.3kV
C.
121 ／ 38.5 ／ 6.3kV
D.
121 ／ 6.3kV
查看完整题目与答案