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Photosynthesis in Higher Plants

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PLANT PHYSIOLOGYPhotosynthesis in Higher PlantsUnit 13 · Class 11 BiologyPlant Physiology · Lecture 6 of 9Class 11 Biology · Unit 131

OVERVIEWWhat this unit coversThe experiments that established what plants actually doWhere photosynthesis happens: the chloroplastPigments, and why leaves are greenThe light reaction: photosystems, the Z-scheme, chemiosmosisThe biosynthetic phase: the Calvin cycleC₄ plants, photorespiration and limiting factorsClass 11 Biology · Unit 132

WHY IT MATTERSPhotosynthesis is the only large-scale process that converts light into chemical energy.Every heterotroph — including us — lives on carbon that a plant fixed and oxygen that a plant released. It is also the source of all fossil fuel, which is photosynthesis run millions of years ago and buried.Class 11 Biology · Unit 133

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