1. Photosynthesis
Section 8.2

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

3. 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.

4. 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

5. 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!

6. Photosynthesis - Recap