Biology 121 Chapter 7

6 Water molecule's + 6 Carbon dioxide molecule's + light is converted into 1 Glucose molecule and 6 Oxygen molecule's

Photosynthesis (photo = light and synthesis = to make) is the process plants use to change carbon dioxide into sugar using sunlight. This sugar, glucose, is their food, and the process gives off oxygen

Occurs in Stroma

Converts CO₂ into Carbohydrates

It is a light-independent reaction

Light independent reactions that occur in the stroma within the process Carbon Fixation

Thykaloid membranes

Thykaloid contains thousands of copies of 2 photosystems: Photosystem I (PS I) And Photosystem II (PS II)

Each photosystem contains 250-400 Chlorophyll and pigment molecules

Pigments absorb light and pass energy to the reaction center

• Contain Chlorophyll
• Chlorophyll is the main pigment that absorbs all light except green

• 1. Sun emitts light energy which is (400-750 nm)
• 2. The light is either absorbed or reflected off surface.
• 3. The Chloroplasts contain chlorophyll that absorb these types of light radiation that is emitted.

Creates the hydrogen ion gradiant

is partially responsible for ATP Synthesis

C₃ are plants like red oaks, they are more wasteful and produce less sugar(glucose)

C₄ however, are plants like sugar cane, they are less wastefull and produce a lot of sugar(glucose)