Photosynthesis Section 8.2.

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Presentation transcript:

Photosynthesis Section 8.2

Photosynthesis The process by which plants convert light energy into chemical energy in the form of carbohydrate (sugar). 6CO2 + 6H2O →Light Energy (sun)→ C6H12O6 + 6O2

2 Stages of Photosynthesis Occurs in a plant’s chloroplast which is GREEN. The green pigment’s name is chlorophyll. Takes place in Two Stages.

Stage 1: The Light-Dependent Reactions Light strikes chlorophyll, energizing an electron. The high energy electron moves through a series of reactions called an electron transport chain. The electron transport chain makes ATP and NADPH for the next stage. Water breaks down The H replaces the one lost by chlorophyll The O2 is released as gas

Stage 2: Light-Independent Reactions CO2is absorbed by the leaves. ATP and NADPH (from the light reactions) donate their electrons. The electrons combine carbons from the CO2 in a series of reactions to eventually make one glucose molecule. SWEET!

Photosynthesis - Recap