问题
单项选择题
各种单体抗体分子都有的特性是( )
A．分子量在10万以下
B．具有两个完全相同的抗原结合部位
C．H链与L链借非共价键相联
D．能促进吞噬
答案
参考答案：B
解析：免疫球蛋白分子的H链和L链可通过二硫键折叠成若干球状功能区，即2条相同的重链(H)和2条相同的轻链(L)。其中，VH和VL是抗原结合部位。
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各种单体抗体分子都有的特性是( )
A．分子量在10万以下
B．具有两个完全相同的抗原结合部位
C．H链与L链借非共价键相联
D．能促进吞噬
参考答案：B
解析：免疫球蛋白分子的H链和L链可通过二硫键折叠成若干球状功能区，即2条相同的重链(H)和2条相同的轻链(L)。其中，VH和VL是抗原结合部位。
| Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. And they also need to give serious (51) to how they can best adapt them selves to such changes. Growing bodies need movement and (52) , but not just in ways that emphasize competition. (53) they are adjusting to their new bodies and a whole host of new intellectual and emotional challenges, teenagers are especially self-conscious and need the (54) that comes from achieving success and knowing that their accomplishments are (55) by others. However, the typical teenage lifestyle is already filled with so much competition that it would be (56) to plan activities in which there are more winners than losers, for example, publishing newsletters with many student-written book reviews, (57) student artwork, and sponsoring book discussion clubs. A variety of small clubs can provide (58) opportunities for leadership, as well as for practice in successful (59) dynamics. Making friends is extremely important to teenagers, and many shy students need the (60) of some kind of organization with a supportive adult barely visible in the background. |
A．displaying
B．describing
C．creating
D．exchanging