核酸对紫外线的最大吸收峰是在A:280nmB:260nmC:200nmD:340nmE:220nm

作者: rantiku 人气: - 评论: 0
问题 核酸对紫外线的最大吸收峰是在
选项 A:280nm B:260nm C:200nm D:340nm E:220nm
答案 B
解析 本题要点是核酸对紫外线的吸收峰值。由于碱基的紫外吸收特征,DNA和RNA溶液均具有260nm紫外吸收峰,这是DNA和RNA定量最常用的方法。注意,蛋白质的紫外吸收峰在280nm,切勿混淆。

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