For DNA, these units are the c, t, a and G bases, and for proteins the units are 20 different amino acids.
对DNA来说，这些单位是C、T、A和G碱基，对蛋白质来说这些单位是20个不同的氨基酸。
Look at basic acids, bases, and salts. Understand the definition for use in chemistry. Explore the concept of equilibrium and how (when aqueous) basic acids, bases, and salts react.
学习酸，碱和盐的基础知识。理解在化学中对它们的定义。研究平衡的概念并了解简单的酸，碱，盐(在水溶液中)如何反应。
Cuvettes are highly chemically resistant. The plastic disposable cuvettes can be used with most polar organic solvents, as well as acids and bases.
试管耐化学腐蚀。塑料通用试管可以使用最常用的有机溶剂，比如酸和碱。
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