By: Bryce Darby

Photosynthesis Definition

Process by which light energy is converted into chemical energy.

The Three Steps

1) Chlorophyll and Carotenoids absorb light energy, water is split into hydrogen and oxygen.

2) The movement of Hydrogen ions across the thylakoids provides energy to produce ATP and NADPH.

3) In the stroma using electrons, carbon enters as carbon dioxide and leaves as sugar.

6CO2 + 6H2O → C6H12O6 + 6CO2

six molecules of water plus six molecules of carbon dioxide produce one molecule of sugar plus six molecules of oxygen

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Photosynthesis uses light energy to drive the electrons from water to their more energetic states in the sugar products, converting solar energy into chemical energy.
In multicellular autotrophs, the main cellular structures that allow photosynthesis to take place include chloroplasts, thylakoids, and chlorophyll.

There are two types of photosynthesis..

Oxygenic Photosynthesis

While different organisms may have differences, they all follow the general equation of

Carbon Dioxide + Water + Light Energy → Carbohydrate + Oxygen.

Anoxygenic Photosynthesis

The phototrophic process where light energy is captured and converted to ATP, without the production of oxygen.