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Review Chapter 8 PHOTOTSYNTHESIS
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autotrophs
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The first stage of photosynthesis, the light harvestings steps are called……
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The light dependent reactions
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These reactions take place in the …...
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Thylakoid membrane
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The light reactions occur in two stages, the first collection of proteins and pigments is called….
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Photosystem II
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Within PSII, the reaction center contains a series of pigments and a special molecule of ____________________ which transfers excited electrons to the primary electron acceptor.
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Chlorophyll a
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Chlorophyll is green because it ________or __________ green light.
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Reflects or transmits
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An absorption spectrum for chlorophyll and the action spectrum for photosynthesis are not exactly the same. WHY?
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Plants generally have more than one type of pigment.
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The energy of the energized electrons from reaction center II are used to ….
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Pump H+ from the stroma to the lumen.
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These energy depleted electrons are used to replace electrons lost in …….
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reaction center I of PSI.
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Energized electrons in PSI are passed to a chlorophyll a, then to a primary electron acceptor and then to an electron transport chain. Eventually they are used to ___________NADP+ to form NADPH
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reduce
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Electrons lost by PSII are replaced by electrons removed from _____________.
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water
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Complete the equation… H 2 O ½ O 2 + ___e - + __H +
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H 2 O ½ O 2 + _2_e - + _2_H +
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H+ pumped to the lumen diffuses through a _____________ to causes the formation of __________ from ________.
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ATP synthase ATP ADP + Pi
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The products of the light reactions are 1. 2. 3.
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1. NADPH 2. ATP 3 Oxygen
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The second Part of Photosynthesis that does not require light is called…
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The “Light independent reactions” The Dark Reactions The Calvin Cycle
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_______________is the enzyme that combines Carbon dioxide with a five carbon molcule called ribulose bis- phosphate to form a 6 carbon molecule.
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rubisco
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Cyclic electron flow is used to generate more _________ because the Calvin cycle needs mor of this energy molecule.
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ATP
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Variations of photosynthesis occur in plants that are sometimes in low carbon dioxide environments where they fix CO2 temporarily in 4 carbon compounds, this type of plant is called a _____ plant.
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C4
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A second variation of photosynthesis occurs in plants that exist in dry environments where somata are closed during most of the day. These plants are called ______________
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CAM Plants
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The products of the Calvin cycle are
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NADP+, ADP + Pi, and 3 carbon compounds.
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The 3 carbon compounds that exit the calvin cycle can be truned into ………..
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Moleucles like glucose, polymers like starch and cellulose or other materials need by the cell.
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The overall equation for photosynthesis is….
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6CO 2 and 6H 2 O C 6 H 12 O 6 + 6O 2
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The reactions of the calvin cycle take place specifically in this area of the chloroplast.
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Stroma
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Q
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