在高中生物教学过程中,我们发现学生对第一章中的第一节“细胞的化学成分”这部分内容不易理解。据学生反映,是由于有机化学部分相应的内容还没有学习,有些概念模糊所致。而本节中涉及有机化学内容的占相当大的比例,教师在讲述时又不宜作过多的补充。所以,把这部分内容形象直观、深入浅出地介绍给学生,把抽象的知识与生活中的一些实例相结合,对他们更好地掌握知识和灵活运用,具有重要意义。在实际教学活动中,我们针对有关问题作了一些探讨,现将取得的经验和出现的问题作一简介,供参考。蛋白质和核酸是构成原生质的主要成分,原生质是生命现象的物质基础。蛋白质和核酸在生物体内占有特别重要的地位。这一部分既是本节的重点,也是难点。讲述蛋白质部分时,应向学生强调指出蛋白质是一种高分子化合物,分子量大,结构复杂,种类极为多样, In the high school biology teaching process, we found that the students were not easy to understand the first part of the first chapter, “the chemical composition of cells.” According to the students, it is due to the organic chemistry part of the corresponding content has not been learned, some of the concepts caused by fuzzy. However, in this section, a large proportion of the content of organic chemistry is involved. Teachers should not make too much supplement in their narration. Therefore, it is of great importance to introduce this part of the content into an intuitive and easy-to-understand introduction to students, combine abstract knowledge with some examples in life, and acquire a better understanding of them and use them flexibly. In the actual teaching activities, we made some discussions on the relevant issues. We will make a brief introduction of the experience gained and the problems that have arisen for reference. Proteins and nucleic acids are the main components of the protoplasm, which is the material basis of life phenomena. Proteins and nucleic acids occupy a particularly important position in the organism. This section is not only the focus of this section, but also difficult. When talking about the protein part, students should emphasize that the protein is a polymer compound, large molecular weight, complex structure, a very diverse species,