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1. photosynthesis
 

1. photosynthesis

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    1. photosynthesis 1. photosynthesis Presentation Transcript

    • PHOTOSYNTHESISI. Metabolism A. Two things need – Energy (E) FOOD Raw materials
    • B. Ways to get food• 1. Autotroph – Primary producer a. photosynthesis LIGHT 6CO2 + 12H2O C6H1206 + 6O2 + 6H20 b. cellular respiration C6H1206 + 6O2 6CO2 + 6H2O 36-38 ATP
    • 2. Heterotroph a. Digestion Polymers Monomers b. Cellular RespirationC6H1206 + 6O2 6CO2 + 6H2O 36-38 ATP
    • II. General Plant – location of photosynthesis A. Basic organs and their functions. LEAFPhotosynthesis (C02 in/O2 out) STEM support ROOT anchor, store materials, uptake water
    • cuticle upper epidermisB. Leaf palisade Mesophyll xylem spongy pholem lower epidermis VASCULAR BUNDLE – bundle sheath around stoma guard cell
    • C. Chloroplast Structure granum stromaouter membInner memb spaceInner memb thylakoid
    • III. PhotosynthesisA. General EQUATION LIGHT6 CO2 + 12 H2O C6H12O6 + 6 O2 + 6 H2O air soil sun(stomata) (xylem) electromagnetic spectrum
    • .1 Source of the material a. CO2 - stomata b. H2O – xylem in roots from soil c. Light – part of electromagnetic spectrum
    • LIGHT400nm 700nmV I B G Y O RWhat happens to light when it hits? Transmit Reflect Absorb
    • Light Reflected lightChloroplastAbsorbedlight Transmitted light
    • 2. Two metabolic pathways LIGHT DEPENDENT LIGHT INDEPENDENT 16 ADP + 16Pi 16 ATP 12 NADP + 12H 12 NADPH12 H2O 24 H+ + 6O2
    • LIGHT DEPENDENT LIGHT INDEPENDENTIN: THYLAKOID STROMAUSES: WATER, LIGHT CO2, ATP, NADPHPRODUCES: HIGH ENERGY COMPOUNDS GLUCOSE
    • B. LIGHT DEPENDENT REACTIONS1. OCCURS PHOTOSYSTEMS = EMBEDDED IN THYLAKOID MEMBRANE2. CHLOROPHYLL KEY LIGHT CAPTURING MOLECULE ABSORBS LIGHT IN WAVELENGTHS OF RED, BLUE, VIOLET3. ACCESSORY PIGMENTS CAROTENOIDS AND PHYCOCYANINS4. PHOTOSYSTEMS – TWO DIFFERENT ONES a. Types PHOTOSYSTEM I PHOTOSYSTEM II
    • b. GENERAL ABOUT PHOTOSYSTEMSb1. THEY ARE EACH A LIGHT HARVESTING COMPLEXb2. GROUP OF MOLECULES (PROTEINS, CHLOROPHYLL, ACCESSORY PIGMENTS, e- CARRIER MOLECULES) THAT WORK TOGETHER TO HARVEST LIGHT INTO HIGH ENERGY COMPOUNDSb3. STRUCTURE - 2 PARTS • LIGHT HARVESTING COMPLEX = 300 CHLOROPHYLL & ACCESSORY • e- TRANSPORT CHAIN = SERIES OF e- CARRIER MOLECULES IN MEMBRANE
    • Photosystem structure ATP SYNTHASE T H e- T RA e- TR N ANSP Y CH SPO O CHAI RT AIN R N L T A K O I D Rxn Ctr P700 M Rxn Ctr P680 E M B Photosystem II Photosystem I
    • ATP SYNTHASET e- TR e- ANSPH T O CHAI RT RA NY N CH SPOL AIN R TAKOID Rxn Ctr P700M Rxn Ctr P680EMB Photosystem II Photosystem I
    • ATP SYNTHASET e- TR e- ANSPH T O CHAI RT RA NY N CH SPOL AIN R TA 2e-K 2e-OID Rxn Ctr P700M Rxn Ctr P680EMB Photosystem II Photosystem I
    • H+ H+ H+ H+OUTSIDE THYLAKOID H+ H+ H+ H+ ATP SYNTHASE T H Y L A 2e- K 2e- O I D Rxn Ctr P700 M Rxn Ctr P680 E M B Photosystem II Photosystem I INSIDE THYLAKOID
    • H+ H+ H+ H+ H+ H+ H+ H+ ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I
    • H+ H+ H+ H+ 16 ATP H+ H+ H+ H+ 16 ADP + P ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I
    • H+ H+ H+ H+ 16 ATP H+ H+ 12 NADPH 12 NADP + 12 H H+ H+ 16 ADP + P ATP SYNTHASETHYLA 2e-K 2e-OIDME 12H2OMB 24H+ + 6O2 Photosystem II Photosystem I
    • C. LIGHT INDEPENDENT REACTION (CALVIN-BENSON CYCLE)1. OCCURS STROMA2. REQUIRES (USES) material from CO2 Air ATP & NADPH Light Dependent RIBULOSE BIPHOSPHATE (RuBP) In chloroplast ENZYMES In membranes
    • NAMING COMPOUNDS CO2 H2ORIBULOSE BIPHOSPHATE PGA RuBP G3P GLUCOSE
    • COUNTING CARBONS - 1 ROTATION 2. ADD 1 ONE CARBON MOLECULE 1 3. BREAKS INTO TWO THREE CARBON1. HAVE 1 FIVE CARBON MOLECULE MOLECULES 5 6 5. NEED TO REGENERATE 4. REARRANGES INTO TWO STARTING FIVE CARBON DIFFERENT THREE MOLECULE SO REMOVE 1 CARBON MOLEC. CARBON 6 1 6. NOT YET
    • COUNTING CARBONS - 6 ROTATIONS 2. ADD 6 ONE CARBON MOLECULE 6 X 1 = 6 3. BREAKS INTO TWELVE THREE CARBON1. HAVE 6 FIVE CARBON MOLECULE MOLECULES 6 X 5 = 30 12 X 3 = 36 ATP ADP + P NADPH NADP + H 5. NEED TO REGENERATE 4. REARRANGES INTO THE SIX STARTING TWELVE DIFFERENT FIVE CARBON MOLEC THREE CARBON MOLEC. SO REMOVE SIX CARBONS 12 X 3 = 36 – 6 = 30 36 6. GLUCOSE