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【多选题】
下列有机物不能发生烷基化反应的是
A.
苯
B.
硝基苯
C.
苯磺酸
D.
苯甲酸
E.
苯酚
F.
甲苯
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参考答案：
举一反三
【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】血浆有很好的综合治疗价值，可用于抗休克、纠正凝血异常、解毒等。关于其使用指征下面说法不正确的是
A.
大量输血且伴有出血倾向者
B.
肝衰竭伴出血者
C.
凝血因子V或X缺乏有出血者
D.
用于置换疗法治疗某些疾病
E.
每单位(200～250ml)FFP可使成人增加约10%凝血因子
查看完整题目与答案
【单选题】What is NOT a key element of a balanced meal?
A.
Proteins.
B.
Fats.
C.
Vitamins.
D.
Sugar.
查看完整题目与答案
【多选题】What physiological functions do proteins have?
A.
Build and repair body tissues
B.
Synthesize physiological substance
C.
Regulate body fluids and maintain PH balance
D.
Boost immunity
查看完整题目与答案
【单选题】The _______ are transmembrane proteins.
A.
lipid-anchored membrane proteins
B.
integral membrane proteins
C.
peripheral membrane proteins
D.
extracellular matrix proteins
查看完整题目与答案
【单选题】What part of the cell makes proteins? ( )
A.
mitochondria
B.
ribosomes
C.
lysosomes
D.
vacuole
查看完整题目与答案
【简答题】【材料】 自2010年中央一号文件首次明确提出“新生代农民工”概念以来，“新生代农民工”群体一直是社会各界关注的热点，也是2010年“两会”上代表、委员们热议的话题。 “新生代农民工，说实话我挺佩服他们，与我们这些上世纪70年代出生的农民工相比，他们身上具有很多值得珍视的优点，”全国首位农民工代表胡小燕说。 胡小燕代表认为，与改革开放前期和中期的农民工大军相比，新一代农民工受教育程度明显提高，眼界...
查看完整题目与答案
【多选题】What is the structure of the SMC proteins (structural maintenance of chromosomes)?
A.
The primary structure of SMC proteins consists of five distinct domains.
B.
The amino- and carboxyl-terminal globular domains, N and C, each of which contains part of an ATP-hydrolytic site, are connected by two regions of α-helical coiled-coil motifs joined by a hinge domain.
C.
The proteins are generally dimeric, forming a V-shaped complex that is thought to be tied together through the protein’s hinge domains.
D.
One N and one C domain come together to form a complete ATP-hydrolytic site at each free end of the V.
查看完整题目与答案
【单选题】What is the secondary structure for proteins?
A.
coagulation of protein chains
B.
peptide bond between individual amino acid
C.
the helix that the protein chain curls into as a result of hydrogen bond and other weak forces
D.
when the protein moleculaes fold back on themselves outside of the helical segments
查看完整题目与答案
【判断题】对图中的每一条支路指定了参考方向的图称为有向图.( )
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【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.
查看完整题目与答案
【单选题】血浆有很好的综合治疗价值，可用于抗休克、纠正凝血异常、解毒等。关于其使用指征下面说法不正确的是
A.
大量输血且伴有出血倾向者
B.
肝衰竭伴出血者
C.
凝血因子V或X缺乏有出血者
D.
用于置换疗法治疗某些疾病
E.
每单位(200～250ml)FFP可使成人增加约10%凝血因子
查看完整题目与答案
【单选题】What is NOT a key element of a balanced meal?
A.
Proteins.
B.
Fats.
C.
Vitamins.
D.
Sugar.
查看完整题目与答案
【多选题】What physiological functions do proteins have?
A.
Build and repair body tissues
B.
Synthesize physiological substance
C.
Regulate body fluids and maintain PH balance
D.
Boost immunity
查看完整题目与答案
【单选题】The _______ are transmembrane proteins.
A.
lipid-anchored membrane proteins
B.
integral membrane proteins
C.
peripheral membrane proteins
D.
extracellular matrix proteins
查看完整题目与答案
【单选题】What part of the cell makes proteins? ( )
A.
mitochondria
B.
ribosomes
C.
lysosomes
D.
vacuole
查看完整题目与答案
【简答题】【材料】 自2010年中央一号文件首次明确提出“新生代农民工”概念以来，“新生代农民工”群体一直是社会各界关注的热点，也是2010年“两会”上代表、委员们热议的话题。 “新生代农民工，说实话我挺佩服他们，与我们这些上世纪70年代出生的农民工相比，他们身上具有很多值得珍视的优点，”全国首位农民工代表胡小燕说。 胡小燕代表认为，与改革开放前期和中期的农民工大军相比，新一代农民工受教育程度明显提高，眼界...
查看完整题目与答案
【多选题】What is the structure of the SMC proteins (structural maintenance of chromosomes)?
A.
The primary structure of SMC proteins consists of five distinct domains.
B.
The amino- and carboxyl-terminal globular domains, N and C, each of which contains part of an ATP-hydrolytic site, are connected by two regions of α-helical coiled-coil motifs joined by a hinge domain.
C.
The proteins are generally dimeric, forming a V-shaped complex that is thought to be tied together through the protein’s hinge domains.
D.
One N and one C domain come together to form a complete ATP-hydrolytic site at each free end of the V.
查看完整题目与答案
【单选题】What is the secondary structure for proteins?
A.
coagulation of protein chains
B.
peptide bond between individual amino acid
C.
the helix that the protein chain curls into as a result of hydrogen bond and other weak forces
D.
when the protein moleculaes fold back on themselves outside of the helical segments
查看完整题目与答案
【判断题】对图中的每一条支路指定了参考方向的图称为有向图.( )
A.
正确
B.
错误
查看完整题目与答案
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