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AP Photosynthesis Flashcards

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11863120908Photosynthesisthe process by which light energy is converted to chemical bond energy and carbon is fixed into organic compounds, two main processes: light-dependent and light-independent0
11863120909Light-Dependent Reactionstakes place in the thylakoid membranes. When a chlorophyll absorbs light causing an electron to be raised to a higher energy level.1
11863120910Photosynthesis Formula6 CO2 + 12 H2O -> C6H12O6 + 6 H2O + 6 O22
11863120911Photosynthetic Pigmentsabsorb light energy and use it to provide energy to carry out photosynthesis, chlorophylls and carotenoids3
11863120916Chloroplastcontains photosynthetic pigments that carry out photosynthesis4
11863120917Stromawhere the light-independent reactions occur5
11863120918Photosystemslight-harvesting complexes in the thylakoid membranes of chloroplasts, few hundred in each thylakoid, consists of reaction center containing chlorophyll a and several hundred antenna pigment moluecules6
11863120919PSIIhappens first, discovered second, absorbs light best in 680 nm range, called P6807
11863120920PSIhappens second, discovered first, absorbs light best in 700 nm range, called P7008
11863120922Photolysiswater gets split apart, providing electrons to provide those lost from chlorophyll a9
11863120923Chemiosmosisprocess by which ATP is formed during the light reactions, proteins were released from water, pumped by thylakoid membrane from stroma into lumen, ATP is formed as these protons diffuse down gradient, through ATP synthase channels10
11863120924NADPcarrier molecule that transfers high-energy electrons from chlorophyll to other molecules11
11863120926Cyclic Photophosphorylationsole purpose is to PRODUCE ATP, no NADPH, used to replenish ATP levels for Calvin cycle, takes photo-excited electrons on a short-circuit pathway, pumped across the thylakoid membrane.12
11863120949Non-cyclic PhotophosphorylationProduction of ATP using the energy from the excited electron from Photosystem II13
11863120928Carbon Fixationthe process that occurs during the Calvin cycle14
11863120929Calvin Cycle stepsCO2 enters, becomes attached to 5-carbon sugar RuBP, unstable molecule breaks into two 3-carbon molecules, rubisco catalyzes step, uses ATP and NADPH from light reactions, occurs only in the light15
11863120930Chloroplastsabsorbs sunlight and uses it to drive the synthesis of organic compounds from carbon dioxide and water.16
11863120931ThylakoidsA flattened membrane sac inside the chloroplast, used to convert light energy to chemical energy.17
11863120932StromaThe fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water.18
11863120933ThylakoidsA flattened, membranous sac inside a chloroplast. Thylakoids often exist in stacks called grana that are interconnected; their membranes contain molecular "machinery" used to convert light energy to chemical energy.19
11863120934ChlorophyllA green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes. Chlorophyll a participates directly in the light reactions, which convert solar energy to chemical energy.20
11863120936Light ReactionsATP, Oxygen, and NAHPH21
11863120939Glyceraldehyde 3-phosphate (G3P)A three-carbon carbohydrate that is the direct product of the Calvin cycle; it is also an intermediate in glycolysis.22
11863120943photosynthesis equation6CO2 + 6H2O → C6H12O6 + 6O2 Photosynthesis requires carbon dioxide and water for the production of sugar and oxygen.23
11863120950Light Independent reactionsCalvin Cycle ; CO2 is essential ; enters chloroplasts by diffusion ; takes place in the stroma of chloroplasts.24

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