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45

代谢 references on wikipedia


代谢
代谢是生物体内所发生的用于维持生命的一系列有序的化学反应的总称。这些反应进程使得生物体能够生长和繁殖、保持它们的结构以及对外界环境做出反应。代谢通常被分为两类:分解代谢可以对大的分子进行分解以获得能量(如细胞呼吸);合成代谢则可以利用能量来合成细胞中的各个组分,如蛋白质和核酸等。代谢可以被认为是生物体不断进行物质和能量交换的过程,一旦物质和能量的交换停止,生物体的结构和系统就会解体。代谢中的化学反应可以被归纳为代谢途径,通过一系列酶的作用将一种化学物质转化为另一种化学物质。酶对于代谢反應来说是至关重要的,因为酶可以通过一個熱力學上易於發生的反應來驅動另一個熱力學上難以進行的反應,使之變得可行;例如,利用ATP的水解所产生的能量来驱动其他化学反应。一个生物体的代谢机制决定了哪些物质对于此生物体是有营养的,而哪些是有毒的。例如,一些原核生物利用硫化氢作为营养物质,但这种气体对于动物来说却是致命的。代谢速度,或者说代谢率,也影响了一个生物体对于食物的需求量。

Domain Referenced Description
Arizona State University Asu.eduArizona State University

BioChemWeb.org: Virtual Library of Biochemistry, Molecular Biology & Cell Biology Biochemweb.orgBioChemWeb.org: Virtual Library of Biochemistry, Molecular Biology & Cell Biology

Biocyc.org Biocyc.orgBiocyc.org

the company of biologists limited Biologists.orgthe company of biologists limited

Life Science Reference - Biology Online Biology-online.orgLife Science Reference - Biology Online

Encyclopedia - Britannica Online Encyclopedia Britannica.comEncyclopedia - Britannica Online Encyclopedia

Akademie věd České republiky Cas.czAkademie věd České republiky

chemsoc - for everyone interested in the chemical sciences Chemsoc.orgchemsoc - for everyone interested in the chemical sciences

American Diabetes Association Journals Diabetesjournals.orgAmerican Diabetes Association Journals

The Endocrine Society Journals Online Endojournals.orgThe Endocrine Society Journals Online

403 Forbidden Expasy.org403 Forbidden

The FASEBJ Journal Fasebj.orgThe FASEBJ Journal

Federation of Animal Science Societies (FASS) Fass.orgFederation of Animal Science Societies (FASS)

GenomeNet Genome.ad.jpGenomeNet

The George Washington University Gwu.eduThe George Washington University

Indian Academy of Sciences - Index Ias.ac.inIndian Academy of Sciences - Index

Jbc.org Jbc.orgJbc.org

The Journal of Cell Biology Jcb.orgThe Journal of Cell Biology

Journal of Lipid Research Jlr.orgJournal of Lipid Research

Molcells.org Molcells.orgMolcells.org

National Institutes of Health (NIH) - Home Page Nih.govNational Institutes of Health (NIH) - Home Page

Nobelprize.org Nobelprize.orgNobelprize.org

American Society for Nutrition - Homepage - Excellence in Nutrition Research and Practice Nutrition.orgAmerican Society for Nutrition - Homepage - Excellence in Nutrition Research and Practice

Oxford Journals Oxfordjournals.orgOxford Journals

Oxygraphics Oxygraphics.co.ukOxygraphics

500 read timeout Physoc.org500 read timeout

Pnas.org Pnas.orgPnas.org

Portland Press Ltd Portlandpress.comPortland Press Ltd

Queen Mary, University of London Qmul.ac.ukQueen Mary, University of London

RCSB Protein Data Bank Rcsb.orgRCSB Protein Data Bank

Reactome Reactome.orgReactome

Rensselaer Polytechnic Institute (RPI) :: Architecture, Business, Engineering, IT, Humanities, Science Rpi.eduRensselaer Polytechnic Institute (RPI) :: Architecture, Business, Engineering, IT, Humanities, Science

Science Gateway Sciencegateway.orgScience Gateway

东南大学 Seu.edu.cn东南大学

Sigma Aldrich Home Sigmaaldrich.comSigma Aldrich Home

SparkNotes: Today s Most Popular Study Guides Sparknotes.comSparkNotes: Today s Most Popular Study Guides

University of St. Thomas : Home Stthomas.eduUniversity of St. Thomas : Home

THE Medical Biochemistry Page Themedicalbiochemistrypage.orgTHE Medical Biochemistry Page

The University of Cincinnati, Cincinnati, Ohio Uc.eduThe University of Cincinnati, Cincinnati, Ohio

Home | Universidade Fernando Pessoa Ufp.ptHome | Universidade Fernando Pessoa

The University of Utah Utah.eduThe University of Utah

The University of Texas at Austin - Web Central Utexas.eduThe University of Texas at Austin - Web Central

University of Virginia Virginia.eduUniversity of Virginia

Washington State University - Pullman, Washington Wsu.eduWashington State University - Pullman, Washington

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