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【简答题】
《砌体结构设计规范》(GB50003)中所列砌体强度设计值是按照施工质量等级为B级确定的,当施工质量等级不为B级时,应对砌体强度设计值进行调整。具体调整的方法就是,按《砌体结构设计规范》所查砌体强度设计值乘以调整系数 ,对于施工质量控制等级为C级的,其取值为 ;当施工质量控制等级为A级时,其取值为 。
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举一反三
【判断题】Nucleases are essentially proteins, while ribozymes are the nucleic acids.
A.
正确
B.
错误
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【单选题】Ribozymes ______.
A.
are RNA molecules
B.
act as catalysts
C.
can build RNA molecules
D.
can carry out exchanges of RNA fragments
E.
all of the above
查看完整题目与答案
【多选题】无因管理制度的特征是( )。
A.
管理他人事务的行为
B.
是为了他人的利益
C.
管理他人事务无法律上的义务
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【多选题】What are the functions of ribozymes?
A.
The best-characterized ribozymes are the self-splicing group I introns, RNase P, and the hammerhead ribozyme. Most of the activities of these ribozymes are based on two fundamental reactions: transesterification and phosphodiester bond hydrolysis (cleavage).
B.
The substrate for a ribozyme is often an RNA molecule, and it may even be part of the ribozyme itself. When its substrate is RNA, the RNA catalyst can make use of base-pairing interactions to align the substrate for the reaction.
C.
Ribozymes vary greatly in size. A self-splicing group I intron may have more than 400 nucleotides. The hammerhead ribozyme consists of two RNA strands with only 41 nucleotides in all. As with protein enzymes, the 3D structure of ribozymes is important for function.
D.
Ribozymes are inactivated by heating above their melting temperature or by addition of denaturing agents or complementary oligonucleotides, which disrupt normal base-pairing patterns. Ribozymes can also be inactivated if essential nucleotides are changed.
查看完整题目与答案
【单选题】下列关于“三个代表”重要思想的叙述,不正确的是
A.
涵盖政治、经济、文化和党的建设等多方面
B.
涉及怎样建设社会主义、怎样建设党的问题
C.
是国际国内新形势下对邓小平理论的发展
D.
是中国共产党第二代领导集体的思想结晶
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【单选题】国外交易所规定，套利的佣金支出与一个回合单盘交易的佣金相比（ ）。
A.
是后者两倍
B.
大于后者两倍
C.
小于后者两倍
D.
介于后者的一倍到两倍之间
查看完整题目与答案
【简答题】核酶（ribozymes）
查看完整题目与答案
【多选题】无因管理制度的特征是( ) 。
A.
管理他人事务的行为
B.
是为了他人的利益
C.
管理他人事务无法律上的义务
D.
管理他人事务有法律上的义务
查看完整题目与答案
【多选题】下列关于“三个代表”重要思想的论述,正确的是
A.
是统一整体,相互联系,相互促进
B.
发展先进生产力是实现最广大人民根本利益的基础条件
C.
人民群众是实现自身利益的根本力量
D.
“三个代表”重要思想开辟了马克思主义的新境界
查看完整题目与答案
【多选题】The following biochemical reactions ___________________ can be catalyzed by ribozymes.
A.
peptide bond formation in protein synthesis
B.
RNA splicing, polymerization, phosphorylation, aminoacylation, and alkylation
C.
DNA ligation
D.
C–C bond rotation (isomerization)
查看完整题目与答案
相关题目：
【判断题】Nucleases are essentially proteins, while ribozymes are the nucleic acids.
A.
正确
B.
错误
查看完整题目与答案
【单选题】Ribozymes ______.
A.
are RNA molecules
B.
act as catalysts
C.
can build RNA molecules
D.
can carry out exchanges of RNA fragments
E.
all of the above
查看完整题目与答案
【多选题】无因管理制度的特征是( )。
A.
管理他人事务的行为
B.
是为了他人的利益
C.
管理他人事务无法律上的义务
查看完整题目与答案
【多选题】What are the functions of ribozymes?
A.
The best-characterized ribozymes are the self-splicing group I introns, RNase P, and the hammerhead ribozyme. Most of the activities of these ribozymes are based on two fundamental reactions: transesterification and phosphodiester bond hydrolysis (cleavage).
B.
The substrate for a ribozyme is often an RNA molecule, and it may even be part of the ribozyme itself. When its substrate is RNA, the RNA catalyst can make use of base-pairing interactions to align the substrate for the reaction.
C.
Ribozymes vary greatly in size. A self-splicing group I intron may have more than 400 nucleotides. The hammerhead ribozyme consists of two RNA strands with only 41 nucleotides in all. As with protein enzymes, the 3D structure of ribozymes is important for function.
D.
Ribozymes are inactivated by heating above their melting temperature or by addition of denaturing agents or complementary oligonucleotides, which disrupt normal base-pairing patterns. Ribozymes can also be inactivated if essential nucleotides are changed.
查看完整题目与答案
【单选题】下列关于“三个代表”重要思想的叙述,不正确的是
A.
涵盖政治、经济、文化和党的建设等多方面
B.
涉及怎样建设社会主义、怎样建设党的问题
C.
是国际国内新形势下对邓小平理论的发展
D.
是中国共产党第二代领导集体的思想结晶
查看完整题目与答案
【单选题】国外交易所规定，套利的佣金支出与一个回合单盘交易的佣金相比（ ）。
A.
是后者两倍
B.
大于后者两倍
C.
小于后者两倍
D.
介于后者的一倍到两倍之间
查看完整题目与答案
【简答题】核酶（ribozymes）
查看完整题目与答案
【多选题】无因管理制度的特征是( ) 。
A.
管理他人事务的行为
B.
是为了他人的利益
C.
管理他人事务无法律上的义务
D.
管理他人事务有法律上的义务
查看完整题目与答案
【多选题】下列关于“三个代表”重要思想的论述,正确的是
A.
是统一整体,相互联系,相互促进
B.
发展先进生产力是实现最广大人民根本利益的基础条件
C.
人民群众是实现自身利益的根本力量
D.
“三个代表”重要思想开辟了马克思主义的新境界
查看完整题目与答案
【多选题】The following biochemical reactions ___________________ can be catalyzed by ribozymes.
A.
peptide bond formation in protein synthesis
B.
RNA splicing, polymerization, phosphorylation, aminoacylation, and alkylation
C.
DNA ligation
D.
C–C bond rotation (isomerization)
查看完整题目与答案