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【简答题】
如果知道某一基因的功能及其相应的蛋白质的氨基酸序列组成，可以通过何种方法克隆该基因?
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反馈参考答案：
举一反三
【单选题】用透析膜插片凝胶电泳法回收DNA片段时,再区带前挖一小槽,将透析膜置于槽中,这时应注意
A.
透析膜要接触DNA区带一侧的胶缘 。
B.
透析膜不能接触DNA区带一侧的胶缘 。
C.
透析膜要接触DNA区带相对一侧的胶缘 。
D.
透析膜不能接触DNA区带相对一侧的胶缘 。
E.
随意插入槽中即可。
【单选题】Stanford University is the second ________university in the world.
A.
large
B.
larger
C.
largest
D.
the largest
【简答题】( A ) There are fifty states in the United States. The largest in population is California, the largest in area is Alaska. Alaska is the smallest in population and Rhode Island is the smallest in size...
【简答题】A．English is the sole official language. B．Few people speak Zulu there. C．It has the largest Indian population outside of America. D．It has the largest mixed race community in Africa.
【单选题】世界旅游日是由世界旅游组织确定的旅游工作者和旅游者的节日,定于每年的()
A.
2019-05-19
B.
2019-05-29
C.
2019-09-17
D.
2019-09-27
【简答题】What can know about the influenza pandemic of 1918 to 1919? A) It is the only large-scale epidemic in modern times. B) It killed about one third of the world’s population. C) It killed more people tha...
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