第一节被子植物分类的形态学基础知识 第二节被子植物形态结构的演化规律和分类原则 第三节被子植物的起源与分类系统简介

第一节裸子植物概述 第二节苏铁纲 第三节银杏纲 第四节松柏纲 第五节红豆杉纲 第六节盖子植物纲

一、什么是生物多样性 二、生物多样性对人类生活的意义 三、生物多样性受威胁现状及原因 四、保护生物多样性的途径(或措施)

20世纪90年代,被誉为生命科学“登月计划”的伟大科学工程 “人类基因组计划”(Human Genome Project,HGP)正式启动 ,近二十年来科学家们所走过的是一条充满艰辛的路,同时也 是一条谱写辉煌的路。回顾这段将在人类历史上永载史册的光 辉历程

1稳态是什么? 2稳态是绝对静止吗? 3怎样维持稳态? 4稳态是生理学的核心概念 5小结

ENZYMES ARE HIGHLY SPECIFIC Enzymes are highly specific both in the reaction catalyzed and in their choice of reactants, which are called substrales. An enzyme usually cata- lyzes a single chemical reaction or a set of closely related reactions. Side

Announcement \Chapter 8 Enzymes: Basic Concepts and Kinetics\ in Lubert Stryer's \Biochemistry\ (Fourth Edition) will be used as my major lecture material, which is available for you to Xerox from your TAs. Chapter 8 in Lehninger's“ Principles of Biochemistry can be used as a reference

This equation accounts for the kinetic data given in Figure 8-15.At very low substrate concentration, when [S] is much less than KM, V [s]Vmax/KMi that is, the rate is directly proportional to the substrate concentration At high substrate concentration, when [SI is much greater than KM, V=Vmax; that is, the rate is maximal, independent of substrate

Much of the catalytic power of enzymes comes from their bringing sub- strates together in favorable orientations in enzyme-substrate (ES)com- plexes. The substrates are bound to a specific region of the enzyme called the active site. Most enzymes are highly selective in their binding

process can occur spontaneously is that the entropy changes of chemical reactions are not readily measured. Furthermore, the criterion of sponta- neity given in equation 2 requires that both the entropy change of the surroundings and that of the system of interest be known. These difficul- ties are obviated by using different thermodynar function called the free energy, which is denoted by the symbol G (or F, in the older literature)