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WHAT YOU WILL LEARN 8.2 PHOTOSYNTHESIS
-the two phases of photosynthesis [ describe / diagram ] -the role structures in chloroplast play in photosynthesis -factors that can affect the rate of photosynthesis
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MAIN IDEA -LIGHT energy CHEMICAL energy
-plants absorb LIGHT ENERGY to create CHEMCIAL ENERGY [glucose] SONG- PHOTOSYNTHESIS RAP
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OVERVIEW OF PHOTOSYNTHESIS
LIST organisms that carry out photosynthesis -photoautotrophs LIST the organelle where photosynthesis takes place -chloroplast thylakoid stroma IDENTIFY the chemical equation for photosynthesis: __________ + __________ __________ + ___________ [REACTANTS] light [PRODUCTS] IDENTIFY the energy form used during photosynthesis chemcial light IDENTIFY the energy form produced during photosynthesis chemcial light 6CO2 6H2O 6O2 C6H12O6
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IMPORTANT STRUCTURES
-INTERNAL STRUCTURE: leaf tissue CHLOROPLAST
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IMPORTANT STRUCTURES- CHLOROPLAST
-located in the cell of leaves -found in the middle layer
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IMPORTANT STRUCTURES- CHLOROPLAST
THYLAKOIDS - “coins” -phase I GRANUM- “stack of coins” STROMA- space -phase II INNER/OUTER MEMBRANE -phospholipid bilayer -carbs transported across membrane
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DRAW
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IMPORTANT STRUCTURES- PLANT
STOMATA- openings in leaf allow exchange of water/gases GUARD CELLS- open & close stomata by changing shape Photosynthesis Animation Open Closed
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IMPORTANT STRUCTURES- PIGMENTS
-light absorbing colored molecules -found in thylakoids of chloroplast CHLOROPHYLL -major light absorbing pigment in plants -gathers sunlight -absorbs light in all wavelengths [violet-blue] -EXCEPT GREEN / Reflects GREEN
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FACTORS THAT AFFECT THE RATE OF PHOTOSYNTHESIS
1-TEMPERATURE Ex-molecule move quickly/speed up -temp 35C/95F destroy enzyme/rate 2-LIGHT INTENSITY Ex-reach max rate 3-CO2 CONCENTRATION Ex-increase 4-WATER Ex-shortage slows/stomata close -rate of gas exchange 5-MINERALS Ex-Mg/Nchlorophyll
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PHASE ONE: LIGHT REACTIONS
PHASE I- NAME: OCCURS IN: STARTS WITH: PRODUCES: light-dependent Light reactions thylakoids light energy H2O -O2 [wastes] -ATP / NADPH [energy/ fully charged]
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PHASE ONE: LIGHT REACTIONS
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ELECTRON TRANSPORT CHAIN
photosystem II photosystem I
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PHASE ONE: LIGHT REACTIONS
PHOTOSYSTEM II ELECTRON CARRIER -convert ADP and NADP+ energy carriers ATP and NADPH PHOTOSYSTEM I -sunlight splits water molecules-H2O -releases oxygen gas- O2 [waste product] -excites electrons ~ e- gain ENERGY -H+ (protons) needed to make food [ATP synthesis]
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PHASE ONE- ELECTRON TRANSPORT
Visualizing Electron Transport
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PHASE TWO: CALVIN CYCLE
NAME: OCCURS IN: STARTS WITH: PRODUCES: The Calvin Cycle light-independent CALVIN CYCLE stroma ATP [energy] NADPH [high energy electrons] CO2 -GLUCOSE [6 carbon sugar] -ADP / NADP+ [uncharged ]
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IMPORTANCE -O2 -GLUCOSE
PHASE ONE/PHASE TWO IMPORTANCE -O2 -GLUCOSE
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OVERVIEW OF PHOTOSYNTHESIS
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COMPLETE DIAGRAM PHASE I/PHASE 2
-ATP -ADP -photosystem I -photosystem II -electron transport -Calvin cycle -light reactions -O2 -CO2 -H2O -C6H12O6 -NADP+ -thylakoid -stroma -CO2glucose -light reactions -Calvin cycle -light dependent -light independent -stroma -thylakoid -light energy -glucose/ADP/NADP+ -ATP/NADPH
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PHASE ONE / PHASE TWO - DIAGRAM
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PHOTOSYNTHESIS PHASES in CHLOROPLAST
CO2 O2 C6H12O6 THYLAKOID STROMA NADP+ NADPH ADP ATP LIGHT REACTIONS CALVIN CYCLE -photosystem II -electron transport -photosystem I
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PHASE ONE / PHASE TWO - DIAGRAM
THYLAKOID STROMA H2O CO2 NADP+ Photo I Electron trans Photo II ADP LIGHT REACTIONS CALVIN CYCLE ATP NADPH O2 C6H12O6
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