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1、ATP and Biochemical PathwayAfter learning this section,you should be able to:Draw a simple schematic that illustrates the structure of ATP Describe ATPs role as a coupling agent that links exergonic and endergonic reactions Describe the components of a biochemical pathway and how they are organized

2、Cells must do work in order to survive and reproduce,such as chemical work,transport work and mechanical work.And they need energy to finish these works.Energy may be defined most simply as the capacity to do work.This is because all physical and chemical processes are the result of the application

3、or movement of energy.Organisms obtain the energy they need from an energy source present in their environment.They convert the energy it provides into a useful form.ATP-The Major Energy Currency of Cells.ATP is formed by exergonic reactions and then used to drive endergonic reactions.What makes ATP

4、 suited for its role as energy currency?-ATP is a high-energy molecule.Biochemical pathways take two main forms:linear and cyclic.Metabolic pathways are interconnected and form a complex network.In this representation of a metabolic network,each ball represents a metabolite formed by reactions in th

5、e network.Each line represents the enzyme-catalyzed reaction that converts one metabolite into another.substrateend product intermediates1.chemical work 化學(xué)反應(yīng)化學(xué)反應(yīng)2.transport work 運(yùn)輸作用運(yùn)輸作用3.mechanical work機(jī)械運(yùn)動(dòng)機(jī)械運(yùn)動(dòng)4.Energy能量能量5.nucleoside triphosphate ATP三磷酸腺苷三磷酸腺苷6.exergonic reactions放能反應(yīng)放能反應(yīng)7.endergo

6、nic reactions耗能反應(yīng)，吸能反應(yīng)耗能反應(yīng)，吸能反應(yīng)8.energy currency能量貨幣能量貨幣9.adenosine diphosphate(ADP)二磷酸腺苷二磷酸腺苷10.orthophosphate(Pi)磷酸鹽磷酸鹽11.aerobic respiration有氧呼吸有氧呼吸12.anaerobic respiration 無(wú)氧呼吸無(wú)氧呼吸13.Fermentation發(fā)酵發(fā)酵A Word list14.chemolithotrophy,化能無(wú)機(jī)營(yíng)養(yǎng)化能無(wú)機(jī)營(yíng)養(yǎng)15.Phototrophy光能營(yíng)養(yǎng)型光能營(yíng)養(yǎng)型16.Hydrolyze水解水解17.Anabolism合成代謝合成代謝18.Substrate底物底物19.end product終產(chǎn)物終產(chǎn)物20.Intermediates中間代謝物中間代謝物21.Biochemical pathways 生化反應(yīng)途徑生化反應(yīng)途徑22.Metabolite代謝物代謝物