1 前言新陈代谢是发生在活细胞中全部有序的化学变化的总称。细胞中的新陈代谢是一个有序的生物化学反应网,它由许多不同的但相关的反应连结而成。反应过程中,旧的物质不断分解,新的物质不断合成。伴随着物质合成和分解的同时,还存在能量的储存与释放。高中生物教材中,涉及到的新陈代谢反应有细胞呼吸、光合作用及微生物代谢的人工控制等。通常用化学反应式来表示新陈代谢过程,要求书写的反应式应该 1 Introduction Metabolism is the general term for all ordered chemical changes that occur in living cells. Metabolism in cells is an ordered network of biochemical reactions that is linked by many different but related reactions. In the course of the reaction, the old substances are continuously decomposed and new substances are continuously synthesized. With the synthesis and decomposition of materials, there is energy storage and release. In the high school biology textbooks, the metabolic reactions involved include cell breathing, photosynthesis, and artificial control of microbial metabolism. Chemical reactions are usually used to express the metabolic process, and the reaction required to write should be