15702975-Basic-Summary-of-Photosynthesis - Biology Notes...

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Biology Notes PHOTOSYNTHESIS (90-93) There are TWO main stages of photosynthesis: - Light-dependent stage , in which water is broken down into hydrogen and oxygen using light energy - Light-independent stage in which the hydrogen reacts with carbon dioxide to form a carbohydrate. Takes place in leaf green parts chloroplasts contain all machinery needed for LDS and LIS. Light-independent takes place Stroma Light-dependent takes place Thylakoid membranes Equation: 6CO 2 + 12H 2 O C 6 H 12 O 6 + 6O 2 + 6H 2 0 Light-Dependent Stage: Photophosphorylation Photolysis Z-scheme Photophosphorylation - Chlorophyll a absorbs light - Energy level of one of its electrons = raised - In this excited stage electron can leave the chlorophyll molecule and pass to another molecule - Electrons in excited state are passed along a chain of electron carrier molecules called an electron transport system - Each molecule along the chain wants the electron more than the previous one and so its passed on through the chain
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This note was uploaded on 12/04/2009 for the course BIOL 230 taught by Professor Gibson during the Spring '09 term at Tennessee Martin.

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15702975-Basic-Summary-of-Photosynthesis - Biology Notes...

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