皮皮学，免费搜题
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【单选题】
患者,男,47岁,既往体,近2月常于夜间出现胸骨后疼痛,昨日夜间再次出现胸痛,遂到急诊就医,患者目前在急诊留观室,急诊科留观室留观患者的时间一般为
A.
1~2天
B.
3~7天
C.
8~10天
D.
11~15天
E.
16~21天
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参考解析：
知识点：
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【简答题】在主视图上能看到物体的长和高,在俯视图上能看到物体的( ) 和( ) ,在左视图上能看到物体的( ) 和( ).
查看完整题目与答案
【单选题】The signal sequence for export from the nucleus is ____________________________.
A.
-Met-Glu-Glu-Leu-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Phe-
B.
-Met-Glu-Glu-Leu-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Tyr-
C.
-Met-Glu-Glu-Leu-Ser-Glu-Ala-Leu-Ala-Ser-Ser-Phe-
D.
-Met-Glu-Glu-Lys-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Phe-
查看完整题目与答案
【单选题】The signal sequence for retention in the lumen of ER is _________________________.
A.
-Lys-Asp-Gly-Leu-COOˉ
B.
-Lys-Asp-Glu-Leu-COO ˉ
C.
-Lys-Asp-Gln-Leu-COO ˉ
D.
-Lys-Asn-Glu-Leu-COO ˉ
查看完整题目与答案
【单选题】What is one function of a signal sequence?
A.
to direct an mRNA molecule into the cisternal space of ER
B.
to bind RNA polymerase to DNA and initiate transcription
C.
to terminate translation of the messenger RNA
D.
to attach ribosomes synthesizing secretory proteins to the ER
查看完整题目与答案
【单选题】The signal sequence for import into the nucleus is _________________________.
A.
-Pro-His-Lys-Lys-Lys-Arg-Lys-Val-
B.
-Ala-Pro-Lys-Lys-Lys-Arg-Lys-Val-
C.
-Pro-Pro-Lys-Lys-Lys-Arg-Lys-Val-
D.
-Pro-Pro-Lys-Lys-Lys-Arg-Lys-Tyr-
查看完整题目与答案
【单选题】美国直接插手 ( ), 阻挠中国人民完成祖国统一大业 , 致使海峡两岸的中国人至今仍处于分离状态。
A.
台湾问题
B.
朝核问题
C.
香港问题
D.
澳门问题
查看完整题目与答案
【多选题】How is a double-pass transmembrane protein with an internal ER signal sequence retained in the lipid bilayer?
A.
In some transmembrane proteins, an internal, rather than an N-terminal, signal sequence is used to start the protein transfer; this internal signal sequence, called a start-transfer sequence, is never removed from the polypeptide.
B.
This arrangement occurs in some transmembrane proteins in which the polypeptide chain passes back and forth across the lipid bilayer. In these cases, hydrophobic signal sequences are thought to work in pairs: an internal start-transfer sequence serves to initiate translocation, which continues until a stop-transfer sequence is reached; the two hydrophobic sequences are then released into the bilayer, where they remain as membrane-spanning α helices.
C.
In complex multipass proteins, in which many hydrophobic α helices span the bilayer, additional pairs of start- and stop-transfer sequences come into play: one sequence reinitiates translocation further down the polypeptide chain, and the other stops translocation and causes polypeptide release, and so on for subsequent starts and stops.
D.
In this way, multipass membrane proteins are stitched into the lipid bilayer as they are being synthesized, by a mechanism resembling the workings of a sewing machine.
查看完整题目与答案
【单选题】The typical sorting signal on a protein is a continuous stretch of amino acid sequence, typically ________ amino acids long. This signal sequence is often (but not always) removed from the finished pr...
A.
10–30
B.
10–60
C.
15–40
D.
15–60
查看完整题目与答案
【单选题】The signal sequence for import into peroxisomes is __________________.
A.
-Ser-Lys-His-
B.
-Pro-Lys-Leu-
C.
-Ser-Lys-Leu-
D.
-Ser-Met-Leu-
查看完整题目与答案
【多选题】下列各项中,应按照“生活服务业”计算缴纳增值税的是( )。
A.
出租文化场所
B.
经营网吧
C.
经营音乐茶座
D.
金融经纪业务
查看完整题目与答案
相关题目：
【简答题】在主视图上能看到物体的长和高,在俯视图上能看到物体的( ) 和( ) ,在左视图上能看到物体的( ) 和( ).
查看完整题目与答案
【单选题】The signal sequence for export from the nucleus is ____________________________.
A.
-Met-Glu-Glu-Leu-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Phe-
B.
-Met-Glu-Glu-Leu-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Tyr-
C.
-Met-Glu-Glu-Leu-Ser-Glu-Ala-Leu-Ala-Ser-Ser-Phe-
D.
-Met-Glu-Glu-Lys-Ser-Gln-Ala-Leu-Ala-Ser-Ser-Phe-
查看完整题目与答案
【单选题】The signal sequence for retention in the lumen of ER is _________________________.
A.
-Lys-Asp-Gly-Leu-COOˉ
B.
-Lys-Asp-Glu-Leu-COO ˉ
C.
-Lys-Asp-Gln-Leu-COO ˉ
D.
-Lys-Asn-Glu-Leu-COO ˉ
查看完整题目与答案
【单选题】What is one function of a signal sequence?
A.
to direct an mRNA molecule into the cisternal space of ER
B.
to bind RNA polymerase to DNA and initiate transcription
C.
to terminate translation of the messenger RNA
D.
to attach ribosomes synthesizing secretory proteins to the ER
查看完整题目与答案
【单选题】The signal sequence for import into the nucleus is _________________________.
A.
-Pro-His-Lys-Lys-Lys-Arg-Lys-Val-
B.
-Ala-Pro-Lys-Lys-Lys-Arg-Lys-Val-
C.
-Pro-Pro-Lys-Lys-Lys-Arg-Lys-Val-
D.
-Pro-Pro-Lys-Lys-Lys-Arg-Lys-Tyr-
查看完整题目与答案
【单选题】美国直接插手 ( ), 阻挠中国人民完成祖国统一大业 , 致使海峡两岸的中国人至今仍处于分离状态。
A.
台湾问题
B.
朝核问题
C.
香港问题
D.
澳门问题
查看完整题目与答案
【多选题】How is a double-pass transmembrane protein with an internal ER signal sequence retained in the lipid bilayer?
A.
In some transmembrane proteins, an internal, rather than an N-terminal, signal sequence is used to start the protein transfer; this internal signal sequence, called a start-transfer sequence, is never removed from the polypeptide.
B.
This arrangement occurs in some transmembrane proteins in which the polypeptide chain passes back and forth across the lipid bilayer. In these cases, hydrophobic signal sequences are thought to work in pairs: an internal start-transfer sequence serves to initiate translocation, which continues until a stop-transfer sequence is reached; the two hydrophobic sequences are then released into the bilayer, where they remain as membrane-spanning α helices.
C.
In complex multipass proteins, in which many hydrophobic α helices span the bilayer, additional pairs of start- and stop-transfer sequences come into play: one sequence reinitiates translocation further down the polypeptide chain, and the other stops translocation and causes polypeptide release, and so on for subsequent starts and stops.
D.
In this way, multipass membrane proteins are stitched into the lipid bilayer as they are being synthesized, by a mechanism resembling the workings of a sewing machine.
查看完整题目与答案
【单选题】The typical sorting signal on a protein is a continuous stretch of amino acid sequence, typically ________ amino acids long. This signal sequence is often (but not always) removed from the finished pr...
A.
10–30
B.
10–60
C.
15–40
D.
15–60
查看完整题目与答案
【单选题】The signal sequence for import into peroxisomes is __________________.
A.
-Ser-Lys-His-
B.
-Pro-Lys-Leu-
C.
-Ser-Lys-Leu-
D.
-Ser-Met-Leu-
查看完整题目与答案
【多选题】下列各项中,应按照“生活服务业”计算缴纳增值税的是( )。
A.
出租文化场所
B.
经营网吧
C.
经营音乐茶座
D.
金融经纪业务
查看完整题目与答案