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1 of 5 © Boardworks Ltd 2009 What is photosynthesis? All life on Earth depends on photosynthesis. The process is described by the following word and symbol equations: carbon + water dioxide light energy oxygen + glucose light energy 6CO2 + 6H2O 6O2 + C6H12O6 These equations are summaries of a complex two-step process that takes place in the chloroplasts of green plants. The end products are not just glucose, but complex organic molecules such as carbohydrates, amino acids, lipids and nucleic acids. 2 of 5 © Boardworks Ltd 2009 Leaves and photosynthesis 3 of 5 © Boardworks Ltd 2009 Plant anatomy 4 of 5 © Boardworks Ltd 2009 Location of the reaction The light-independent reaction takes place in the stroma of the chloroplasts. The light-independent reaction can also be called the “dark reactions”, or the Calvin Cycle. The reaction consists of a cycle of enzyme-controlled processes making complex molecules such as carbohydrates. stroma 5 of 5 © Boardworks Ltd 2009