ATP. ATP & ADP  ATP: Adenine triphosphate  adenine + ribose + 3 phosphates  Energy storing molecule, only stores energy for a few minutes  Source.

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  • ATP

  • ATP & ADPATP: Adenine triphosphateadenine + ribose + 3 phosphatesEnergy storing molecule, only stores energy for a few minutesSource of all cell energy currency of the cell; different cell functions require different amounts of ATPAdenineRibose3 Phosphate groups

  • ATP ADP CYCLEWhen one phosphate group breaks off, energy for cell work is releasedADP can reform into ATP by bonding another phosphate group

  • ADP: Adenosine diphosphateAdenine + ribose + 2 phosphatesMolecule that results from ATP losing one PADP

    ATPEnergyEnergyPartiallychargedbatteryFullychargedbatteryAdenosine diphosphate (ADP) + Phosphate Adenosine triphosphate (ATP)

  • How do cells use energy in ATP?When the phosphate bond is broken, the cell can use the released energy for different processes:In photosynthesis, for making glucose making new molecules - such as enzymes, cell membrane components, organelles, maintain homeostasis, transmit nerve impulses, move cilia, remove wastes, etc.

  • ATP ADP cycle in cellsIn photosynthesis: ATP is PRODUCED during Light-dependent reactionsATP is USED during Dark-dependent reactions to make sugar and sustain plant cell functions

    In cell respiration: ATP is PRODUCED when breaking down sugars from foodATP is USED to sustain cell functions


  • Photosynthesis

    process using energy from sunlight to convert water and CO2 into oxygen and carbohydrates (sugar)

    Two parts:Light dependent reactions: produce O2 & converts ADP to ATP

    Calvin cycle (dark reactions): use ATP from light reactions to produce sugars

  • Chlorophyll: green pigment inside chloroplasts in plant cells that absorbs blue & red light energyMoves energy to electrons that drive reactionsChloroplastChloroplastLight-Dependent ReactionsCalvinCycle

  • Overview cellular respirationRespiration: process that releases energy by breaking down food when oxygen is presentFormula:C6H12O6 + O2 CO2 + H2O

  • Fermentation: respiration without oxygen presentTwo types:Alcoholic: form ethyl alcohol and CO2 as waste products; used to make bread riseLactic acid: produces lactic acid in muscles when exercising without enough oxygen

  • How photosynthesis & respiration relate.Almost opposite processesPhotosynthesis produce food (store)Respiration breaks down food (releases)

    Photosynthesis uses CO2 and releases O2Respiration releases CO2 and uses O2

  • Quiz 4The formula CO2 + H2O --- C6H12O6 + O2 is the formula for ? a. photosynthesis b. respiration___ is the process which breaks down food molecules to release energy and takes place in the mitochondria. a. photosynthesis b. digestion c. respiration___ is formed when ATP releases a phosphate. a. ADP b. AMP c. APPFermentation is a form of ___ respiration which occurs without the presence of oxygen. a. aerobic b. anaerobic c. antioxidantThe green pigment which is present in plant cells and allows them to go through photosynthesis is ___. a. chlorophyll b. chloroplast c. chlorosis



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