第一节核酸的酶促降解 第二节核苷酸的降解代谢 第三节核苷酸的合成代谢

第一节蛋白质合成体系的组成 第二节蛋白质合成过程

新陈代谢是所有生物维持其生命活动的最基本的 特性,是生物体内有机物合成和分解作用,包括物质 转变和能量转化

一、丙酮酸氧化脱羧 在有氧条件下,丙酮酸氧化脱羧形成乙酰CoA,后者可进入三羧酸循环彻底氧化

定义：维持生物正常生命过程必需的一类小分子有机化合物，它在生物体内含量极少，大多 数由食物供给，人体自身不能合成它们。 脂溶性：A、D、E、K，单独具有生理功能。 水溶性：B1、B2、B6、B12、C 等，辅酶

泵 pump 载体 carriers 通道 channels

1. Enzymes Are Powerful and Highly Specific Catalysts 2. Free Energy Is a Useful Thermodynamic Function for Understanding Enzymes －热力学

1.The Exploration of Genes Relies on Key Tools 2.Recombinant DNA Technology Has Revolutionized All Aspects of Biology 3.Complete Genomes Have Been Sequenced and Analyzed 4.Eukaryotic Genes Can Be Manipulated with Considerable Precision

1.The Purification of Proteins Is an Essential First Step in Understanding Their Function 2. The Characterization of Proteins: Molecular Weight, isoelectric point. 3 . Amino Acid Sequencing and primary structure

1. Biochemical Unity Underlies Biological Diversity 2. DNA Illustrates the Interplay between Form and Function 3. Concepts from Chemistry Explain the Properties of Biological Molecules 4.The Genomic Revolution Is Transforming Biochemistry and Medicine