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Understanding Photosynthesis: The Miracle of Plant Growth

Explore the fascinating process of photosynthesis, how plants convert sunlight to energy, and the key components involved. Learn about historic experiments, reactants, and products in this essential biological process.

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Understanding Photosynthesis: The Miracle of Plant Growth

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  1. Photosynthesis Please copy this in your Notebook. The last 2 slides should be on the left side of your notebook

  2. Photosynthesis • When I plant a seed that weighs 1 gram, how does it grow into a huge sequioa tree which weighs tons? • Where does the extra weight come from? The soil? The water? • Dutch Physician Jan Van Helmont • Soil weighed constantly 75 grams • Water was the only thing he added • Joseph Priestley • Observed a plant keep a flame alive underneath a glass dome • Jan Ingenhousz figured out that plants produce oxygen in light • Photosynthesis • Plants convert the energy of sunlight into the energy in the chemical bonds of carbohydrates

  3. Requirements for Photosynthesis • Sunlight – different wavelengths of visible light are needed for photosynthesis • Carbon dioxide • Water • Pigments– absorb the specific wavelengths (colors) from light • Chlorophyll is the primary pigment in plants. • Energy storing compounds • ATP (adenosine triphosphate) – power currency of the cell

  4. “Simplified” EQUATIONFORPHOTOSYNTHESIS Energy (Light) 6CO2 + 6H2O + C6H12O6 + 6O2 CARBON DIOXIDE GLUCOSE OXYGEN WATER

  5. Photosynthesis: Reactants and Products Light Energy Chloroplast CO2 + H2O Sugars + O2 Go to Section:

  6. H2O CO2 Sugars O2 Photosynthesis Overview Light Chloroplast NADP+ Chloroplast ADP + P Light- Dependent Reactions Calvin Cycle ATP NADPH

  7. Fill in the Boxes below. Light Reactions (Light dependent) Dark Reactions (Light independent) light, ADP, NADP+, H2O ATP, NADPH, CO2 What you need glucose, ADP, NADP+ ATP, NADPH, O2, H+ What you get

  8. Photosynthesis + H2O CO2 Energy ATP and NADPH2 Water is broken Light is Adsorbed By Chlorophyll ADP NADP Calvin Cycle Chloroplast Used Energy and is recycled. O2 + C6H12O6 Light Reaction Dark Reaction

  9. Light- dependent reactions Calvin cycle Energy from sunlight Thylakoid membranes ATP Stroma NADPH High-energy sugars ATP NADPH O2 Chloroplasts Concept Map Photosynthesis includes takes place in uses use take place in to produce to produce of Go to Section:

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