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【单选题】
下列各项与RNA原位杂交法无关的是（）
A.
高温修复
B.
组织细胞及时固定
C.
蛋白酶K
D.
预杂交
E.
杂交
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In the 1920s demand for American farm products fell, as European countries began to recover from World War I and instituted austerity (紧缩) programs to reduce their imports. The result was a sharp drop...
A.
might cause greater scarcity of farm products
B.
didn't give the Secretary of Agriculture enough power
C.
would benefit neither the government nor the farmers
D.
benefited one group of citizens at the expense of others
【单选题】当F+×F-杂交是下列说法对的是( )
A.
F因子几乎总不转移到F+细胞中
B.
F- 菌株几乎总成为F+
C.
基因重组的发生频率较高
D.
F因子经常插入到F-细胞染色体上