1GlycolysisDr. Mark Holbrook 8.11(b) Mechanical work: ATP binds noncovalentlyto motor proteins, then is hydrolyzedMembrane proteinPiADP+PSoluteSolute transportedPiVesicleCytoskeletal trackMotor proteinProtein moved(a) Transport work: ATP phosphorylatestransport proteinsATPATPExamples of ATP Energy Use(“P-class”)How Do Cells Make ATP?•Respiration•Fermentation
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2Cellular RespirationFood energycellular workC6H12O6+ 6 O26 H2O + 6 CO2+ energya-D-GlucoseGlucose is the model food moleculeWhy Glucose?5.6Polymers of glucose are used by plants and animals for energy storageOxidation of Glucose is SpontaneousIf glucose is “burned”Glucose + O2CO2+ H2O (heat also produced)Free (usable) Energy releasedHow much? DG= _686 kcal/mole(1 mole is about 180 grams of glucose)“slow burn”(step-wise oxidations)