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【单选题】
关于蛋白质分子三级结构的描述错误的是A.
天然蛋白质分子均有这种结构
B.
具有三级结构的多肽链多具有生物学活性
C.
三级结构的稳定主要靠次级键维系
D.
亲水基团多聚集在三级结构的表面
E.
决定折叠的因素是氨基酸残基
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【简答题】Lipitor is a prescription medicine. Along with diet and exercise, it lowers "bad", cholesterol in your blood. It can also raise "good'' cholesterol? Lipitor can lower the risk of heart attack in patie...
【多选题】T℃时，在V L恒容密闭容器中加入足量的TaS 2 (s)和1 mol I 2 (g)，发生反应TaS 2 (s)＋2I 2 (g) TaI 4 (g)＋S 2 (g) △H＞0。t min时生成0.1 mol TaI 4 。下列说法正确的是
A.
0～t min内，v(I 2 )＝ mol·L －1 ·min －1
B.
若T℃时反应的平衡常数K＝1，则平衡时I 2 的转化率为2/3
C.
如图制备TaS 2 晶体过程中循环使用的物质是S 2 (g)
D.
图中T 1 端得到纯净TaS 2 晶体，则温度T 1 ＜T 2
【判断题】When you talk about your working attitude in a job interview, you should try to be positive.
A.
正确
B.
错误
【简答题】ABOUT LIPITOR l l Lipitor is a prescription medicine. Along with diet and exercise, it lowers “bad” cholesterol in your blood. It can also raise “good" cholesterol. l Lipitor can lower the risk of hea...
【单选题】A 27-year-old woman has recently been diagnosed with a glioma. Further family history reveals tht her 4-year-old son has been diagnosed with leukemia and has been undergoing chemotherapy. In addition,...
A.
activates the GTPase activity of the gene product of the Ras oncogene
B.
excises ultraviolet light-induced thymidine dimers
C.
functions as a cytoplasmic tyrosine kinase
D.
functions as a transmembrane tyrosine kinase
E.
halts the cell cycle if DNA damage is detected
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