【简答题】人类β-珠蛋白的等位基因Hba(造成镰状细胞贫血)编码蛋白的第6位由Glu变成Val,Hba中则由Glu变为Lys,两个突变的先后次序如何?
【单选题】— __ is the word? —It's a noun. [ ]
【简答题】在水溶液中,Val、Glu、Ile、Lys、Asn、Gly这几种残基中的______趋向于球蛋白的内部,______趋向于球蛋白的表面,而______则分布比较均匀。
【单选题】A policy is ______.
B.
a kind of legal agreement
C.
a printed form. of payment
D.
a particular kind of insurance
【单选题】镰刀形红细胞贫血患者血红蛋白分子中( )
E.
α链第六位Val→Glu,β链第六位Glu→Val
【判断题】The design of sequential circuits can be completed by using the incompleteness of case statements.
【单选题】鲸鱼肌红蛋白的一段 α 螺旋序列是 Ser-Glu-Gly-Glu-Trp-Gln-Leu-Val-Leu-His-Val-Trp-Ala-Lys-Val-Glu- ,其中在螺旋中与 His 的氨基 N 形成氢键的羰基 O 是由哪个氨基酸残基提供的
【单选题】Which of the following biasing circuits can be used with E-MOSFETs?
【判断题】在使用三分法构图时,把拍摄主体放在四条线段上,可以让主体更加突出、使照片充满活力。
【简答题】The circuits can be working on the three conditions; these are ______________, _____________ and ______________.