Plant cells and some algae contain an organelle called the chloroplast. Chloroplasts are concentrated in the leaves of plants and allows plants to harvest energy from sunlight, a process called photosynthesis. Pigments in the chloroplasts absorb sunlight and use this energy to combine carbon dioxide and water to make glucose and oxygen. The complete reaction is: 6CO2 + 6H20 + Sun Energy = C6H12O6 + 6O2

Raw Materials (Reactants)
CO2 = carbon dioxide
H2O = water

What gets made (Products)
C6H12O6 = glucose
O2 = oxygen

Plant cells can use this process to manufacture glucose, a simple sugar. Some of the glucose is used immediately for cellular respiration, where it is converted to a high energy compound called ATP. You might recall from studies of the cell, that the process of creating ATP occurs in the mitochondria. Glucose that is not used right away is packaged as carbohydrates or fats and then stored in the roots, seeds, and fruits. All autotrophs can make their own food in this way, unlike heterotrophs, which must consume (eat) food. When you eat a potato, you are eating the carbohydrates that the plant created from sunlight.

What two types of cells contain chloroplasts?

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