皮皮学，免费搜题
登录
搜题
【单选题】
我国数学家在一次报告中“以一支粉笔多长为好”为例来讲解他倡导的优选法。他说,“每支粉笔都要丢掉一段一定长的粉笔头,这一点来说,越长越好。但太长了,使用起来又不方便,而且容易折断。因此就出现了粉笔多长最合适的问题---这就是优选问题。”所谓优选问题,从辩证法角度看就是A.
注重量的积累
B.
保持事物质的稳定性
C.
坚持适度原则
D.
全面考虑事物属性的多样性
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【判断题】教学方法的选择是指根据教学内容特点和学生年龄特征，以及学生的知识技能基础，选择不同教学方法来激发并维持学习者的注意和兴趣，传递教学内容，实现教学目标。（）
A.
正确
B.
错误
【单选题】By fusing the gene encoding a protein under study with the gene for an epitope tag, investigators can precipitate the protein product of the fusion gene by complexing it with the antibody that binds t...
A.
precipitation
B.
immunoprecipitation
C.
protein precipitation
D.
antigen precipitation
【单选题】If fusion to green fluorescence protein (GFP) does not impair the function or properties of a protein one wishes to study, the fusion protein can be used to reveal the protein’s ________ in the cell u...
A.
structure
B.
folding
C.
location
D.
partners
【单选题】The gene for almost any protein can be altered to express a fusion protein that can be purified by affinity chromatography. The peptide or protein used for this purpose is referred to as a tag. Which ...
A.
The gene encoding the target protein is fused to a gene encoding a peptide or protein that binds a large, unstable ligand with high affinity and specificity.
B.
Tag sequences can be added to genes such that the resulting proteins have tags at their amino or carboxyl terminus.
C.
Even very small tags can affect the properties of the proteins they are attached to, thereby influencing the study results.
D.
Even if the tag is removed by a protease, one or a few extra amino acid residues can remain behind on the target protein, which may or may not affect the protein’s activity.
【简答题】2015年7月1日,我国颁布了《 》,这是为落实党中央关于维护国家安全的一系列战略部署,按照总体国家安全观的要求制定的一部统领各安全领域的具有综合性、全局性、基础性的国家安全法律。
【简答题】A fusion protein can easily be isolated by ____________________ chromatography.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
