7．激活剂（activator）

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2021-04-14 问题

7．激活剂（activator）

2022-07-23 问题

乳糖操纵子是（）控制，在转录过程中需要（） A: 正activator B: 负activator C: 负inducer D: 正inducer

2021-04-14 问题

降解物基因活化蛋白（Catabolic gene activator protein）

2022-06-05 问题

Operator is bound by A: activator B: repressor C: promoter D: enhancer E: silencer

2022-06-01 问题

In positive regulation, most of the genes are usually inactive (that is, RNA polymerases do not bind to the promoters) and the cell synthesizes only the activator proteins needed to promote transcription of the subset of genes required in the cell at that time.

In positive regulation, most of the genes are usually inactive (that is, RNA polymerases do not bind to the promoters) and the cell synthesizes only the activator proteins needed to promote transcription of the subset of genes required in the cell at that time.

2022-06-15 问题

In severe intravascular hemolysis, DIC can be caused by the release of large amount of ( ). A: tissue factor B: adenosine diphosphate C: factor I D: tissue-plasminogen activator E: platelet factors

In severe intravascular hemolysis, DIC can be caused by the release of large amount of ( ). A: tissue factor B: adenosine diphosphate C: factor I D: tissue-plasminogen activator E: platelet factors

2022-06-15 问题

In severe intravascular hemolysis, DIC can be caused by the release of large amount of() A: Tissue factor B: Adenosine diphosphate (ADP) C: Factor Ⅰ D: Tissue-plasminogen activator(t-PA) E: Platelet factors

In severe intravascular hemolysis, DIC can be caused by the release of large amount of() A: Tissue factor B: Adenosine diphosphate (ADP) C: Factor Ⅰ D: Tissue-plasminogen activator(t-PA) E: Platelet factors

2022-06-19 问题