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Photosynthesis Notes Biology Unit 05 Lesson 01 Chemosynthesis Chemosynthesis uses energy released from chemical reactions to produce food for organisms. Organisms that carry out chemosynthesis are microbes (bacteria) that live far from the Sun, such as deep on the ocean floor. Which Organisms Carry Out Photosynthesis? Autotrophs such as plants and some protists Photosynthesis Photosynthesis is the cellular process in which autotrophs capture light energy and convert it to chemical energy (glucose) using carbon dioxide and water. Equation for Photosynthesis 6CO2 + 6H2O + Light Energy C6H12O6 + 6O2 Carbon Dioxide + Water + Light Energy Glucose (sugar) + Oxygen Reactants & Products of Photosynthesis REACTANTS PRODUCTS Carbon Dioxide Glucose (sugar) Water Oxygen Light Energy Where Does Photosynthesis Occur? Chloroplasts Contain chlorophyll in plant cells or autotrophs Light Dependent Reaction Occurs in the thylakoid Water is absorbed through roots. Sunlight enters the chloroplast, causing H2O molecules to split. O2 leaves as a waste product through the stomata. NADP+ picks up the H+ ions (becoming NADPH) and moves them to the stroma for the light independent reaction (Calvin cycle). Light Independent Reaction –Calvin Cycle Carbon dioxide from the atmosphere enters H+ breaks off from NADPH NADP+ returns to the Light Dependent Reaction Carbon dioxide becomes “fixed” with the H+ producing the glucose molecule C6H12O6. Reactants & Products of Photosynthesis REACTIONS PRODUCTS
