1概述本专题包括组成细胞的元素及其作用、组成细胞的化合物种类及其作用两部分内容。《考试大纲》对这部分内容有明确要求:(1)蛋白质、核酸的结构和功能;(2)糖类、脂质的种类和作用;(3)水和无机盐的作用。此外,还包括“检测生物组织中的还原糖、脂肪和蛋白质”“观察DNA、RNA在细胞中的分布”两个实验。 1 Overview This topic includes the elements that make up a cell and their roles, the types of compounds that make up a cell, and their roles. The Syllabus contains specific requirements for this part: (1) the structure and function of proteins and nucleic acids; (2) the types and effects of carbohydrates and lipids; and (3) the role of water and inorganic salts. In addition, it also includes the “detection of reducing sugars, fats and proteins in biological tissues” to observe the distribution of DNA and RNA in cells. "Two experiments.