PHOTOSYNTHESIS

ENDOTHERMIC PROCESS!

Absorbs energy from surroundings

Photosynthesis or 'carbon fixing' - first step of life (an inorganic compound is transformed into an organic compound)

Photolysis - Splitting of water molecules

Low frequency,

Long wavelength

High frequency,

Short wavelength

LIGHT DEPENDENT

Uses light energy to generate ATP and split water molecule to make H+ ions.

LIGHT INDEPENDENT

Uses ATP and H+ ions to 'fix' CO2, making C6H12O6.

*Plants appear green because they contain chloroplast, which contains the pigment chlorophyll. Chlorophyll absorbs all light except green light (which it reflects), making plants appear green.

Oxygen is the waste product.
Larger molecules have more bonds, take more energy to build, thus they can act as energy stores.

STARCH

- Contains 1-4 glycocidic linkage

- Also called amylose, broken down by enzyme AMYLASE

- Straight chain structure (alpha glucose); cellulose is branched chain structure (structural support in plants)

"CHLOROPHYLL IS THE MAIN PHOTOSYNTHESIS PIGMENT"

RATE OF PHOTOSYNTHESIS

- Change in biomass

- CO2 uptake

- O2 production

FACTORS AFFECTING PHOTOSYNTHESIS

1) Light Intensity

2) Humidity

3) Temperature

4) CO2 concentration

5) pH