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【简答题】
5位同学总是坐在同一排,这可能是因为: (1) 他们真的是彼此喜欢; (2) 没有其他人想坐在他们旁边。 哪种解释更符合脂双层的装配机理呢? 假定脂肪分子采用另一种方式,则脂双层的性质将会如何改变?
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【多选题】How are enzyme-coupled receptors activated?
A.
To do its job as a signal transducer, an enzyme-coupled receptor has to switch on the enzyme activity of its intracellular domain (or of an associated enzyme) when an external signal molecule binds to its extracellular domain.
B.
Unlike GPCRs, enzyme-coupled receptor proteins usually have only one transmembrane segment, which spans the lipid bilayer as a single α helix. Because a single α helix is poorly suited to transmit a conformational change across the bilayer, enzyme-coupled receptors have a different strategy for transducing the extracellular signal.
C.
In many cases, the binding of an extracellular signal molecule causes two receptor molecules to come together in the plasma membrane, forming a dimer. This pairing brings the two intracellular tails of the receptors together and activates their kinase domains, such that each receptor tail phosphorylates the other.
D.
In the case of RTKs, the phosphorylations occur on specific tyrosines.
【简答题】直接写它数 着n×得0= 小他+w0得= 90×他0= 他 小 - 着 小 = 9.着+着.w= n.小-w.得= n得×着= w- w 7 =
【简答题】As we know, there are differences between western culture and Chinese culture. We can see differences when we pay attention to the way words are used. Let’s look at the words about animals and plants....
【简答题】阅读理解。 There are differences between western culture and Chinese culture. We can see differences when we pay attention to the way words are used. Let's look at the words about animals and plants. Most ...
【多选题】______________, _____________and ______________ are the three sources of Western culture.
A.
Ancient Greek culture
B.
ancient Roman culture
C.
Christian culture
D.
Indian culture
【简答题】As we know, there are differences between western culture and Chinese culture. We can see differences when we pay attention to the words that are used. Let’s look at the words about describing anima...
【简答题】如图为人体血液循环示意图，图中⑤⑥⑩（12）是心脏的四个腔．请据图回答问题： （1）血液循环是在由心脏和______组成的封闭的管道中进行的，其中⑥③①⑧⑦（12）⑩组成的循环路线是______． （2）肺循环的起点是[______]______． （3）某人得了重感冒，静脉注射青霉素后，在心脏中最先发现药物的是[______]______其内血液是______血．
【单选题】In western culture,( )is one of the central themes, and emphasizes privacy and the right of individuals rather than that of society.
A.
capitalism
B.
individualism
C.
socialism
D.
environmentalism
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