Intro to photosynthesis
The light-dependent reactions
The Calvin cycle
Photorespiration: C3, C4, and CAM plants
Unit test
10 questions

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About this unit
There's a lot of carbon in your body - in DNA, proteins, carbohydrates, fats, and other key biological molecules. How did that carbon get there? Drumroll... photosynthesis! Learn how plants and other photosynthetic organisms use light energy to make sugars from carbon dioxide and water, bringing both chemical energy and readily usable carbon into Earth’s global ecosystem.