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【单选题】
The conserved _____________________ domain binds membrane proteins with phosphorylated tyrosine (phosphotyrosine) residues, but not their unphosphorylated form. Thus the association of many amphitropic proteins with the plasma membrane can be reversibly controlled by the enzymatic addition or removal of a single phosphoryl group on a protein Tyr residue.
A.
pleckstrin homology (PH)
B.
SH2 (Src homology)
C.
zinc finger
D.
death effector
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【单选题】特定的社会或群体在一定历史时期内形成并被人们普遍认同和广泛持有的占主导地位的价值观念,指的是文化的()
A.
次要价值观
B.
核心价值观
C.
有关社会成员关系的价值观
D.
浪漫主义价值观
【单选题】Given the following two tables: TAB1 R1 A A A B B C C D E TAB2 R2 A A B B C C D Which of the following queries returns the following result set? RETVAL E（）
A.
SELECT r1 AS retval FROM tab1 INTERSECT SELECT r2 AS retval FROM tab2
B.
SELECT r1 AS retval FROM tab1 EXCEPT SELECT r2 AS retval FROM tab2
C.
SELECT DISTINCT r1 AS retval FROM tab1, tab2 WHERE r1 <> r2
D.
SELECT r1 AS retval FROM tab1 UNION SELECT r2 AS retval FROM tab2
【单选题】对碱基组成为5'-nnnCCGCCGCCGnnn-3'的序列描述错误的是（ ）
A.
属于间隔重复序列
B.
属于串联重复序列
C.
属于三联碱基重复
D.
可能是重组热点区
相关题目：
【单选题】特定的社会或群体在一定历史时期内形成并被人们普遍认同和广泛持有的占主导地位的价值观念,指的是文化的()
A.
次要价值观
B.
核心价值观
C.
有关社会成员关系的价值观
D.
浪漫主义价值观
【单选题】Given the following two tables: TAB1 R1 A A A B B C C D E TAB2 R2 A A B B C C D Which of the following queries returns the following result set? RETVAL E（）
A.
SELECT r1 AS retval FROM tab1 INTERSECT SELECT r2 AS retval FROM tab2
B.
SELECT r1 AS retval FROM tab1 EXCEPT SELECT r2 AS retval FROM tab2
C.
SELECT DISTINCT r1 AS retval FROM tab1, tab2 WHERE r1 <> r2
D.
SELECT r1 AS retval FROM tab1 UNION SELECT r2 AS retval FROM tab2
【单选题】对碱基组成为5'-nnnCCGCCGCCGnnn-3'的序列描述错误的是（ ）
A.
属于间隔重复序列
B.
属于串联重复序列
C.
属于三联碱基重复
D.
可能是重组热点区
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