Published on

This ppt provide a base knowledge of bioenergetics

Published in: Education
1 Comment
  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide


  1. 1. 1BIOENERGETICSBIOENERGETICSCopyright Cmassengale
  2. 2. 2What is Bioenergetics?The study ofenergyenergy in livinglivingsystemssystems(environments)and theorganismsorganisms(plants andanimals) thatutilize themCopyright Cmassengale
  3. 3. 3Energy Required byall organisms May beKinetic orPotentialenergyCopyright Cmassengale
  4. 4. 4Kinetic Energy Energy ofMotion Heat andlight energyareexamplesCopyright Cmassengale
  5. 5. 5Potential Energy EnergyEnergy ofofpositionposition IncludesIncludesenergyenergystored instored inchemicalchemicalbondsbondsCopyright Cmassengale
  6. 6. 6Two Types ofEnergy ReactionsCopyright Cmassengale
  7. 7. 7Endergonic Reactions Chemical reactionChemical reaction thatrequires a net input ofenergyenergy. PhotosynthesisPhotosynthesis6CO2 + 6H2O → C6H12O6 + 6O2SUNphotonsphotonsLightEnergy(glucose)(glucose)Copyright Cmassengale
  8. 8. 8Exergonic Reactions Chemical reactionsChemical reactions thatreleases energyreleases energy Cellular RespirationC6H12O6 + 6O2 → 6CO2 + 6H2O+ ATP(glucose)(glucose)EnergyEnergyCopyright Cmassengale
  9. 9. 9Metabolic Reactionsof CellsCopyright Cmassengale
  10. 10. 10What is Metabolism? The sum totalsum totalof thechemicalchemicalactivitiesactivities ofall cellscells.Copyright Cmassengale
  11. 11. 11Two Types of Metabolism AnabolicAnabolicPathwaysPathways CatabolicCatabolicPathwaysPathwaysCopyright Cmassengale
  12. 12. 12Anabolic PathwayAnabolic Pathway Metabolic reactions,Metabolic reactions, whichconsume energyconsume energy (endergonic),(endergonic), tobuildbuild complicated molecules fromsimpler compounds. PhotosynthesisPhotosynthesis6CO2 + 6H2O → C6H12O6 + 6O2SUNlightlightenergyenergy(glucose)(glucose)Copyright Cmassengale
  13. 13. 13Catabolic PathwayCatabolic Pathway Metabolic reactionsMetabolic reactions which releasereleaseenergyenergy (exergonic)(exergonic) by breakingbreakingdowndown complex molecules in simplercompounds Cellular RespirationCellular RespirationC6H12O6 + 6O2 → 6CO2 + 6H2O + ATP(glucose)(glucose)energyCopyright Cmassengale
  14. 14. 14Cellular Energy -Cellular Energy -ATPATPCopyright Cmassengale
  15. 15. 15ATPATP Components:Components:1. adenine: nitrogenous base1. adenine: nitrogenous base2. ribose:2. ribose: five carbon sugarfive carbon sugar3.phosphate group: chain of 33.phosphate group: chain of 3riboseriboseadenineadenineP P Pphosphate groupphosphate groupCopyright Cmassengale
  16. 16. 16Adenosine TriphosphateAdenosine Triphosphate ThreeThreephosphatephosphategroups-groups-(two(twowith highwith highenergy bondsenergy bonds Last phosphateLast phosphategroup (POgroup (PO44))contains thecontains theMOST energyMOST energyCopyright Cmassengale
  17. 17. 17Breaking the Bonds of ATPBreaking the Bonds of ATP Process is calledphosphorylationphosphorylation Occurs continuallyin cells Enzyme ATP-aseATP-asecan weaken &break last POlast PO44bondbond releasingenergy & free PO4Copyright Cmassengale
  18. 18. 18How does ATP work ?How does ATP work ? Organisms use enzymesenzymes tobreak down energy-richenergy-richglucoseglucose to release itspotential energy This energy is trapped andstored in the form ofadenosine triphosphate(ATP)adenosine triphosphate(ATP)Copyright Cmassengale
  19. 19. 19How Much ATP Do Cells Use?How Much ATP Do Cells Use? It is estimatedthat each celleach cellwill generateand consumeapproximately10,000,00010,000,000molecules ofmolecules ofATPATP per secondper secondCopyright Cmassengale
  20. 20. 20Coupled Reaction - ATPCoupled Reaction - ATP The exergonicexergonichydrolysishydrolysis of ATPATPis coupled withthe endergonicendergonicdehydrationdehydrationprocessprocess bytransferringtransferring aphosphate groupphosphate groupto anothermolecule.HH22OOHH22OOCopyright Cmassengale
  21. 21. 21Hydrolysis ofHydrolysis of ATPATPATP + H2O → ADP + P(exergonic)HydrolysisHydrolysis(add water)(add water)P P PAdenosine triphosphate (ATP)Adenosine triphosphate (ATP)P P P++Adenosine diphosphate (ADP)Adenosine diphosphate (ADP)Copyright Cmassengale
  22. 22. 22Hyrolysis is ExergonicHyrolysis is ExergonicEnergyEnergyUsedUsedbybyCellsCellsCopyright Cmassengale
  23. 23. 23Dehydration ofDehydration of ATPATPADP +ADP + PP →→ ATPATP ++ HH22OO(endergonic(endergonic)P P PAdenosine triphosphate (ATP)Adenosine triphosphate (ATP)P P P++Adenosine diphosphate (ADP)Adenosine diphosphate (ADP)DehydrationDehydration(Remove H(Remove H22OOCopyright Cmassengale
  24. 24. 24Dehydration is EndergonicDehydration is EndergonicEnergyEnergyisisrestoredrestoredininChemicalChemicalBondsBondsCopyright Cmassengale
  25. 25. 25ReviewReviewCopyright Cmassengale
  26. 26. 26How many high energyHow many high energyphosphate bonds does ATPphosphate bonds does ATPhave?have?Copyright Cmassengale
  27. 27. 27Which is true of photosyntheis?Which is true of photosyntheis?AnabolicAnabolic oror CatabolicCatabolicExergonicExergonic OrOr EndergonicEndergonicCopyright Cmassengale
  28. 28. 28The breakdown of ATP isThe breakdown of ATP isdue to:due to:DehydrationDehydration oror HydrolysisHydrolysisHH22O addedO added oror HH22O removedO removedCopyright Cmassengale
  29. 29. 29Which Reactions are oftenWhich Reactions are oftenCoupled in OrganismsCoupled in OrganismsHydrolysisHydrolysis oror DehydrationDehydrationAnabolismAnabolism or Catabolismor CatabolismEndergonicEndergonic oror ExergonicExergonicBOTHBOTHBOTHBOTHBOTHBOTHCopyright Cmassengale
  30. 30. 30Ready for the test?Ready for the test?If not, review andIf not, review andtry again!!!try again!!!Copyright Cmassengale