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Learn about the process of photosynthesis in plants, including the conversion of sunlight, carbon dioxide, and water into energy, oxygen, and glucose. Discover the role of chloroplasts, the Calvin cycle, and the benefits of photosynthesis in food production, oxygen generation, and carbon dioxide reduction.
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Photosynthesis BIO 1113/1114 Oklahoma City Community College Dennis Anderson
Energy Carbon Dioxide Water Glucose Photosynthesis Reaction + + Oxygen
Energy Carbon Dioxide Water Oxygen Glucose Respiration Reaction + +
Leaf Leaf cross section Leaf cell Chloroplast Granum Thylakoid
Sunlight Breaks Water Apart Electrons Water Hydrogens Oxygen
Figure 8.5Collecting Solar Energy, Boosting Electrons primaryelectronacceptor primaryelectronacceptor e– NADP+ sunlight sunlight NADPH to Calvin cycle electrons photosystem I electron fall supplies energy thatwill lead to ATP synthesis photosystem II
Oxygen Calvin Cycle or Dark Reaction Carbon Dioxide Glucose ATP NADH
Figure 8.8Summary of Photosynthesis in the Chloroplasts of Plant Cells sunlight Calvin cyclereactions instroma Calvin cycle light reactions in thylakoids ADP NADP+ chloroplast
Plants Store Energy • Wheat from Egyptian tombs still has energy stored from photosynthesis after thousands of years. • Fossil fuels such as coal store energy that was originally produced by photosynthesis millions of years ago
Benefits of Photosynthesis • Produce food • Produce oxygen • Remove carbon dioxide from the atmosphere • Inhibit global warming