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【多选题】
What are posttranslational modifications of proteins ?A.
In addition to folding properly, many proteins—once they leave the ribosome—require further adjustments before they are useful to the cell. Namely, many proteins require posttranslational modifications (PTMs) to become fully functional.
B.
To be useful to the cell, a completed polypeptide must fold correctly into its three-dimensional conformation and then bind any required cofactors and protein partners—all via noncovalent bonding.
C.
Many proteins also require one or more covalent modifications to become active—or to be recruited to specific membranes or organelles.
D.
Although phosphorylation and glycosylation are the most common, more than 100 types of covalent modifications of proteins are known.
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【单选题】贝叶斯决策是通过计算样本后验概率的大小来进行决策的，下面表达式中wi代表类别，x代表样本，能够表示后验概率的是
A.
P（x）
B.
P（wi|x）
C.
P（wi）
D.
P（x|wi）
【单选题】Refer to Exhibit 13-6. How much output will the monopolist produce?
A.
Q1
B.
Q2
C.
Q3
D.
zero
【简答题】纯电阻在正弦交流电作用下,电压相位超前电流相位( ) 度。
【简答题】__________是人脑直接作用于感觉器官的事物整体的反映。
【简答题】纯电感在正弦交流电作用下,电压相位超前电流相位( ) 度。
【简答题】是人脑对直接作用于感觉器官的事物整体的反映。
【单选题】贝叶斯决策是通过计算样本后验概率的大小来进行决策的,下面表达式中wi代表类别,x代表样本,能够表示后验概率的是
A.
P（wi）
B.
P（ x ）
C.
P(x|w i )
D.
P(w i |x)
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