皮皮学，免费搜题
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搜题
【单选题】
角膜基质层占角膜总厚度的
A.
50 ﹪
B.
60 ﹪
C.
70 ﹪
D.
80 ﹪
E.
90 ﹪
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
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举一反三
【单选题】既是抗原又是抗体的物质是( )
A.
类毒素
B.
干扰素
C.
生理盐水
D.
细菌外毒素
E.
破伤风抗毒素
查看完整题目与答案
【单选题】What is the common factor of the three sounds: p, k, t?
A.
voiceless
B.
spread
C.
voiced
D.
nasal
查看完整题目与答案
【单选题】对人体既是抗原又是抗体的物质是
A.
细菌外毒素
B.
马抗破伤风血清
C.
具有免疫活性的淋巴细胞
D.
HLA
E.
干扰素
查看完整题目与答案
【单选题】( )游戏的文化特点 要 求儿童去做“被告知”的事情,注重儿童责任感的培养和活动方式方法的一丝不苟。
A.
身体技能型
B.
运气型游戏
C.
策略型游戏
D.
体育游戏
查看完整题目与答案
【简答题】What is the common factor of the three sounds:[p] [t] [k] ?A. Voiceless. B. Voiced. C. Spread. D. Nasal.
查看完整题目与答案
【多选题】What are the function of the three different nuclear RNA p olymerases in eukaryotic cells?
A.
Eukaryotes have three RNA polymerases, designated I, II, and III, which are distinct complexes but have certain subunits in common. Each polymerase has a specific function and is recruited to a specific promoter sequence.
B.
RNA polymerase I (Pol I) is responsible for the synthesis of only one type of RNA, a transcript called preribosomal RNA (or pre-rRNA), which contains the precursor for the 18S, 5.8S, and 28S rRNAs. Pol I promoters differ greatly in sequence from one species to another.
C.
The principal function of RNA polymerase II (Pol II) is synthesis of mRNAs and some specialized RNAs. This enzyme can recognize thousands of promoters that vary greatly in sequence. Some Pol II promoters have a few sequence features in common, including a TATA box (eukaryotic consensus sequence TATA(A/T)A(A/T)(A/G)) near base pair −30 and an Inr sequence (initiator) near the RNA start site at +1. However, such promoters are in the minority, and elaborate interactions with regulatory proteins guide Pol II function at many promoters that lack these features.
D.
RNA polymerase III (Pol III) makes tRNAs, the 5S rRNA, and some other small specialized RNAs. The promoters recognized by Pol III are well characterized. Some of the sequences required for the regulated initiation of transcription by Pol III are located within the gene itself, whereas others are in more conventional locations upstream of the RNA start site.
查看完整题目与答案
【单选题】对人体既是抗原又是抗体的物质是
A.
细菌外毒素
B.
马抗破伤风血清
C.
类毒素
D.
HLA
E.
干扰素
查看完整题目与答案
【单选题】For a large pane one flight attendant per ______ passenger seat is needed.
A.
50
B.
100
C.
150.
D.
200
查看完整题目与答案
【单选题】该段视频是希望你体会:人在压力情境下如何获得( )
A.
道德提升
B.
身体健康
C.
心灵成长
查看完整题目与答案
【单选题】What time will the staff meeting begin?
A.
At three o'clock.
B.
At half past three.
C.
At half past four.
查看完整题目与答案
相关题目：
【单选题】既是抗原又是抗体的物质是( )
A.
类毒素
B.
干扰素
C.
生理盐水
D.
细菌外毒素
E.
破伤风抗毒素
查看完整题目与答案
【单选题】What is the common factor of the three sounds: p, k, t?
A.
voiceless
B.
spread
C.
voiced
D.
nasal
查看完整题目与答案
【单选题】对人体既是抗原又是抗体的物质是
A.
细菌外毒素
B.
马抗破伤风血清
C.
具有免疫活性的淋巴细胞
D.
HLA
E.
干扰素
查看完整题目与答案
【单选题】( )游戏的文化特点 要 求儿童去做“被告知”的事情,注重儿童责任感的培养和活动方式方法的一丝不苟。
A.
身体技能型
B.
运气型游戏
C.
策略型游戏
D.
体育游戏
查看完整题目与答案
【简答题】What is the common factor of the three sounds:[p] [t] [k] ?A. Voiceless. B. Voiced. C. Spread. D. Nasal.
查看完整题目与答案
【多选题】What are the function of the three different nuclear RNA p olymerases in eukaryotic cells?
A.
Eukaryotes have three RNA polymerases, designated I, II, and III, which are distinct complexes but have certain subunits in common. Each polymerase has a specific function and is recruited to a specific promoter sequence.
B.
RNA polymerase I (Pol I) is responsible for the synthesis of only one type of RNA, a transcript called preribosomal RNA (or pre-rRNA), which contains the precursor for the 18S, 5.8S, and 28S rRNAs. Pol I promoters differ greatly in sequence from one species to another.
C.
The principal function of RNA polymerase II (Pol II) is synthesis of mRNAs and some specialized RNAs. This enzyme can recognize thousands of promoters that vary greatly in sequence. Some Pol II promoters have a few sequence features in common, including a TATA box (eukaryotic consensus sequence TATA(A/T)A(A/T)(A/G)) near base pair −30 and an Inr sequence (initiator) near the RNA start site at +1. However, such promoters are in the minority, and elaborate interactions with regulatory proteins guide Pol II function at many promoters that lack these features.
D.
RNA polymerase III (Pol III) makes tRNAs, the 5S rRNA, and some other small specialized RNAs. The promoters recognized by Pol III are well characterized. Some of the sequences required for the regulated initiation of transcription by Pol III are located within the gene itself, whereas others are in more conventional locations upstream of the RNA start site.
查看完整题目与答案
【单选题】对人体既是抗原又是抗体的物质是
A.
细菌外毒素
B.
马抗破伤风血清
C.
类毒素
D.
HLA
E.
干扰素
查看完整题目与答案
【单选题】For a large pane one flight attendant per ______ passenger seat is needed.
A.
50
B.
100
C.
150.
D.
200
查看完整题目与答案
【单选题】该段视频是希望你体会:人在压力情境下如何获得( )
A.
道德提升
B.
身体健康
C.
心灵成长
查看完整题目与答案
【单选题】What time will the staff meeting begin?
A.
At three o'clock.
B.
At half past three.
C.
At half past four.
查看完整题目与答案