The Need for Energy

Energy is essential to life. The molecule that stores energy is

ATP or adenosine triphosphate.

The Need for Energy ATP is the energy carrier for the cell.

ATP allows energy to be immediately available for cell processes.

Photosynthesis Photosynthesis is the process that uses

the sun’s energy to make simple sugars.6CO2 + 6H2O C6H12O6 + 6O2

Photosynthesis takes place in the chloroplast of plant and algal cells.

Where are chloroplasts

found?

Photosynthesis Pigments like chlorophyll are required for

photosynthesis to take place. Photosynthetic pigments are stored in the

thylakoids of the chloroplast.

Thylakoid

grana

Vein

Water enters the plant through the

roots and travels up to the leaf through

the veins.

Water then travels to each cell through a process known as OSMOSIS.

Stomata

Carbon dioxide then travels to each cell through a process known as Diffusion.

Carbon dioxide enters the leaf

through the stomata.

Photosynthesis

Photosynthesis happens in 2 phases:Light-dependent reaction

Chloroplast StageElectron Transport Chain

Light-independent reactionCalvin cycleCarbon FixationProduces Glucose

Light Dependent Reaction The Light Dependent Reaction

converts light energy into chemical energy and produces ATP.

The products of the Light Dependent Reaction are used to fuel the Light Independent Reaction.Light

H2OO2

ATPH

chloroplast

Light Independent Reaction The Light Independent Reaction takes

place in the stroma of the chloroplast.

ATP

CO2

C6H12O6

H

stromathylakoids

chloroplast