What Role do Pigments play in Photosynthesis?

R O Y G B I V Pigments- colored substances that reflect

or absorb light.  Chlorophyll- green pigment in plants,

absorb red and blue regions.  Carotenoid- orange/yellow pigments found

in carrots, absorb green and blue regions.  Chloroplast- organelle in the leaf where

sunlight is collected and photosynthesis takes place.

Chloroplast Thylakoids- Saclike photosynthetic

membranes (Grana-Stacks of thylakoids) Stroma- Fluid Portion of the chloroplast

outside of the thylakoid

NADP+

Electron Energy Carrier that transfers energy to another molecule.

Accepts 2 high energy electrons and one H+ (Hydrogen Ion) and converts NADP+ into NADPH.

Conversion of NADP+ into NADPH Energy of the sunlight can be trapped in

chemical form.

NADPH

Carry the high-energy electrons that were produced by light absorption in chlorophyll to chemical reactions elsewhere in the cell.

Help build molecules the cell needs like carbohydrates such as glucose.

2 Stages of Photosynthesis

1.) Light Dependent Stage1. Sunlight hits the leaf and solar energy is

collected in the chloroplast.2. Electrons become “excited”.3. Water is split- H’s carry electrons/ O’s

sent to atmosphere. 

2.) Light-Independent ReactionsCO2 from atmosphere enters the leaf.

Calvin Cycle X6Glucose made

Factors affecting PhotosynthesisLight IntensityCarbon Dioxide ConcentrationTemperatureWater

 Uses of GlucoseAnimal EnergyPlant Growth/ Starch